Pedi Neck Mass Slides 071031

download Pedi Neck Mass Slides 071031

of 116

Transcript of Pedi Neck Mass Slides 071031

  • 8/14/2019 Pedi Neck Mass Slides 071031

    1/116

    Pediatric Neck MassesPediatric Neck Masses

    MarkMarkDomanskiDomanski, M.D., M.D.

    MichaelMichael UnderbrinkUnderbrink, M.D., M.D.

    Dept. of OtolaryngologyDept. of Otolaryngology

    University of Texas MedicalUniversity of Texas MedicalBranch, GalvestonBranch, Galveston

    October 31October 31stst, 2007, 20071

  • 8/14/2019 Pedi Neck Mass Slides 071031

    2/116

    Total % oftotal

    Congeital lesions 244 55%Branchial cleft cyst 78 18%

    Thyroglossal duct cyst 73 16%Dermoid cyst 43 10%Lymphangioma 34 8%Hemangioma 10 2%Teratoma 2Bronchogenic cyst 2

    Thymic cyst 1Myelomeningocele 1

    Inflammatory lesions 118 27%

    Reactive lympadenopathy 71 16%Undetermined etiology 66 15%

    Sinus histiocytosis 5 1%Granulomatous disease 32 7%

    Atypical mycobacteria 20 4%Cat scratch disease 6 1%Toxoplasmosis 2Sarcoid 2

    Suppurative lympadenitis 10 2%Sialadenitis 5 1%

    Non-infammatory benignlesions

    23 5%

    Inclusion cyst 13 3%Fibromatosis 9 2%Keliod 1

    Benign neoplasms 12 3%

    Neurofibroma 3 1%

    Lipoma 3 1%Lipoblastoma 2Paraganglioma 1Goiter 1Benign mixed tumor 1Osteoblastoma 1

    Malignant neoplasms 48 11%

    Lymphoma 34 8%Hodgkin's 23 5%Non-Hodkin's 11 2%

    Thyroid Carcinoma 6 1%

    Rhabdomyosarcoma 2Neuroblastoma 2Fibrous histiocytoma 1Acinic cell carcinoma 1Histiocytosis X 1Chloroma 1

    Total 445TorsiglieriTorsiglieri et al., 1988et al., 198822

  • 8/14/2019 Pedi Neck Mass Slides 071031

    3/116

    TorsiglieriTorsiglieri et al., 1988et al., 198822

    Inflammatory

    lesions

    27%

    Malignant

    neoplasms, 11%Benign neoplasms

    3%

    Non-infammatory

    benign lesions

    5%

    Congenital lesions

    54%

    N= 445

  • 8/14/2019 Pedi Neck Mass Slides 071031

    4/116

    Initial EvaluationInitial Evaluation

    H&PH&P AgeAge

    OnsetOnset

    Rapidity of growthRapidity of growth Fluctuation in sizeFluctuation in size

    PainPain

    InfectionInfection TraumaTrauma

    TravelTravel

    ExposureExposure

    PEPE SizeSize

    MultiplicityMultiplicity

    LateralityLaterality ConsistencyConsistency

    ColorColor

    MobilityMobility TendernessTenderness

    FluctuationFluctuation

    Congenital

    Inflammatory

    Benign

    Malignant

  • 8/14/2019 Pedi Neck Mass Slides 071031

    5/116

    Location, Location, Location!Location, Location, Location!

    Moir. 20048

  • 8/14/2019 Pedi Neck Mass Slides 071031

    6/116

  • 8/14/2019 Pedi Neck Mass Slides 071031

    7/116

    Likely Etiology Determines DirectionLikely Etiology Determines Direction

    of Testingof Testing

    XX--rayray

    U/SU/S

    CTCT

    MRIMRI

    FNAFNA

    Surgical BiopsySurgical Biopsy

    Tissue CultureTissue Culture

    CXRCXR

    LabsLabs

    PPDPPD Gram stainGram stain

    CultureCulture

  • 8/14/2019 Pedi Neck Mass Slides 071031

    8/116

    Pediatric Neck MassesPediatric Neck Masses

    1. Congenital lesions1. Congenital lesions 2. Inflammatory lesions2. Inflammatory lesions

    3. Non3. Non--inflammatory benign lesionsinflammatory benign lesions 4. Benign4. Benign neoplasmsneoplasms

    5. Malignant5. Malignant neoplasmsneoplasms

  • 8/14/2019 Pedi Neck Mass Slides 071031

    9/116

    Pediatric Neck MassesPediatric Neck Masses

    1. Congenital lesions1. Congenital lesions 2. Inflammatory lesions2. Inflammatory lesions

    3. Non3. Non--inflammatory benign lesionsinflammatory benign lesions 4. Benign4. Benign neoplasmsneoplasms

    5. Malignant5. Malignant neoplasmsneoplasms

  • 8/14/2019 Pedi Neck Mass Slides 071031

    10/116

    1. Congenital Lesions1. Congenital Lesions

    Branchial cleft cyst 78 18%Thyroglossal duct cyst 73 16%Dermoid cyst 43 10%Lymphangioma 34 8%

    Hemangioma 10 2%Teratoma 2Bronchogenic cyst 2

    Thymic cyst 1Myelomeningocele 1

  • 8/14/2019 Pedi Neck Mass Slides 071031

    11/116

    EmbryologyEmbryology Ectoderm,Ectoderm,

    mesoderm,mesoderm,

    endodermendoderm

    Incomplete closureIncomplete closure

    may result inmay result inbranchial cleftbranchial cleft

    anomaliesanomalies

    Moir. 20048

  • 8/14/2019 Pedi Neck Mass Slides 071031

    12/116

    Development of First Four Arches

    Nicollas. 20003

    Each arch layer gives rise to:

    nerve (ectoderm)

    artery, muscle and cartilage (mesoderm)

    glands (endoderm).

  • 8/14/2019 Pedi Neck Mass Slides 071031

    13/116

    Cyst Sinus Fistula

    Schroeder. 20074

    Branchial CleftBranchial Cleft AnomaliesAnomalies

  • 8/14/2019 Pedi Neck Mass Slides 071031

    14/116

    Distribution of neck malformations

    as cysts, fistulas, or sinusesper Nicollas et. al. (n=191)

    Nicollas. 20003

    (Sinus)

    Total 139 5 47 191

  • 8/14/2019 Pedi Neck Mass Slides 071031

    15/116Moir. 20048

  • 8/14/2019 Pedi Neck Mass Slides 071031

    16/116

    Imagining in Branchial Cleft CystsImagining in Branchial Cleft Cysts

    MRIMRI

    More reliably confirmsMore reliably confirmscystic naturecystic nature

    More precisely definesMore precisely defines

    lesionlesion Better to delineateBetter to delineate

    glandular tissueglandular tissue

    ieie fat planesfat planes

    CTCT

    Adequate for mostAdequate for mostlesionslesions

    Cost, availabilityCost, availability

    U/SU/S

    cysticcystic vsvs noncysticnoncystic

    does not evaluatedoes not evaluateextentextent

    Both MRI and CT have difficulty distinguishing branchial

    cleft cyst from lymphangioma in children.

    BranstetterBranstetter, 20069

  • 8/14/2019 Pedi Neck Mass Slides 071031

    17/116

    11stst

    Branchial Cleft Cyst, Type IIBranchial Cleft Cyst, Type II Type IType I

    EctodermalEctodermal duplication ofduplication ofEACEAC

    Near external auditoryNear external auditory

    canalcanal Usually inferior andUsually inferior and

    posterior to tragusposterior to tragus

    Type IIType II Associated withAssociated with

    submandibularsubmandibular glandgland

    BranstetterBranstetter, 20069

  • 8/14/2019 Pedi Neck Mass Slides 071031

    18/116

    Type 1 First Branchial Cleft CystType 1 First Branchial Cleft Cyst

    Both MRI and CT havedifficulty distinguishingbranchial cleft cyst from

    lymphangioma inchildren.

    BranstetterBranstetter, 20069

    LymphangiomaLymphangioma

    mass

    auricle

    parotid

  • 8/14/2019 Pedi Neck Mass Slides 071031

    19/116

    Branchial CystBranchial Cyst

    NoncalcifiedNoncalcified

    massmass

    CT shows lesionCT shows lesion

    under SCMunder SCM

    Malik et al 20026

  • 8/14/2019 Pedi Neck Mass Slides 071031

    20/116

    22ndnd Brachial Cleft CystBrachial Cleft Cyst

    T2 MRIT2 MRI

    Posterior to RPosterior to Rsubmandibularsubmandibularglandgland

    Thickened wallsThickened walls

    suggest priorsuggest priorhemorrhage orhemorrhage orinfectioninfection

    Gujar and Mukherji 20045

  • 8/14/2019 Pedi Neck Mass Slides 071031

    21/116

    Anterior to carotid bifurcationAnterior to carotid bifurcation

    Schroeder et al, 20074

  • 8/14/2019 Pedi Neck Mass Slides 071031

    22/116

    Under the anterior SCMUnder the anterior SCM

    Schroeder et al, 20074

  • 8/14/2019 Pedi Neck Mass Slides 071031

    23/116

    Exiting skin medial to lateral border of SCMExiting skin medial to lateral border of SCM

    Schroeder et al, 20074

  • 8/14/2019 Pedi Neck Mass Slides 071031

    24/116

    Left 2Left 2ndnd

    BA FistulaBA Fistula

    Anterior to carotid bifurcationAnterior to carotid bifurcation

    Under the anterior SCMUnder the anterior SCM

    Exiting skin medial to lateral border of SCMExiting skin medial to lateral border of SCM

    Schroeder et al, 20074

  • 8/14/2019 Pedi Neck Mass Slides 071031

    25/116

    Moir. 20048

  • 8/14/2019 Pedi Neck Mass Slides 071031

    26/116

    Moir. 20048

  • 8/14/2019 Pedi Neck Mass Slides 071031

    27/116

    Moir. 20048

  • 8/14/2019 Pedi Neck Mass Slides 071031

    28/116

    22ndnd

    BA cyst with sinusBA cyst with sinustract extending intotract extending into

    the pharynx above thethe pharynx above the

    carotid bifurcationcarotid bifurcation

    Schroeder et al, 20074

    Watch the hypoglossal!

  • 8/14/2019 Pedi Neck Mass Slides 071031

    29/116

    PreauricularPreauricular SinusSinus

    Not related to 1Not related to 1stst

    branchial cleftbranchial cleft

    anomaliesanomalies

    Active infectionActive infectionduring excisionduring excision

    increases chance ofincreases chance ofrecurrancerecurrance

    Moir. 20048

  • 8/14/2019 Pedi Neck Mass Slides 071031

    30/116

    ThyroglossalThyroglossal Duct CystDuct Cyst persistent tract from thepersistent tract from the

    descent of the thyroiddescent of the thyroidfrom the foramenfrom the foramencecumcecum

    epithelial liningepithelial lining

    composed of eithercomposed of eithersquamoussquamous or respiratoryor respiratoryepitheliumepithelium

    confirm normal thyroidconfirm normal thyroidtissuetissue

    Learning Radiology.com200711

  • 8/14/2019 Pedi Neck Mass Slides 071031

    31/116

    ThyroglossalThyroglossal Duct CystDuct Cyst CT w/ ContrastCT w/ Contrast

    Embedded in theEmbedded in the

    strap musclesstrap muscles

    Extends deep toExtends deep to

    involve the preinvolve the pre--epiglotticepiglottic spacespace

    Gujar and Mukherji 20045

  • 8/14/2019 Pedi Neck Mass Slides 071031

    32/116

    Moir. 20048

  • 8/14/2019 Pedi Neck Mass Slides 071031

    33/116

    Moir. 20048

  • 8/14/2019 Pedi Neck Mass Slides 071031

    34/116

    DermoidDermoid CystsCysts

    Ectoderm and mesodermEctoderm and mesoderm 7% of7% ofdermoiddermoid cysts occur in head andcysts occur in head and

    neckneck

    Thought to be of congenital inclusionThought to be of congenital inclusion

    typetype

    mean diameter = 1.2 cm (0.6mean diameter = 1.2 cm (0.6--3.3)3.3)

    Treatment: complete excisionTreatment: complete excision

    Pryor et al 200512

  • 8/14/2019 Pedi Neck Mass Slides 071031

    35/116

    DermoidDermoid CystsCysts Cranial TheoryCranial Theory

    GrunwaldGrunwald in 1910in 1910AsAs neuroectodermalneuroectodermal tract recedes,tract recedes, demaldemal

    attachementsattachements follow its course and canfollow its course and can

    form a sinus or cystform a sinus or cyst

    Beware of possible intracranialBeware of possible intracranial

    involvementinvolvement

    Pryor et al 200512

  • 8/14/2019 Pedi Neck Mass Slides 071031

    36/116

    Orbit is the most common site for dermoids in the head and neck(61%)

    Direct excision is sufficient for neck dermoids, more extensiveapproaches (craniotomy, mastoidectomy) are needed for othersites

    DiffDiffdxdx: in midline of neck:: in midline of neck: thyroglossalthyroglossal duct cystduct cyst

    in head & neck, n = 59

    Pryor et al 200512

  • 8/14/2019 Pedi Neck Mass Slides 071031

    37/116

    DermoidDermoid CystsCysts

    H & E

    CT of dermoid cyst

    Pryor et al 200512

  • 8/14/2019 Pedi Neck Mass Slides 071031

    38/116

    TeratomaTeratoma H&N account for ~2% ofH&N account for ~2% of

    teratomasteratomas

    NewbornNewborn 2.5 yr at2.5 yr at

    presentationpresentation All 3 germinal layers presentAll 3 germinal layers present

    Mostly benign lesionsMostly benign lesions

    amenable to curativeamenable to curative

    excisionexcision

    WakhluWakhluA et alA et al 200013

  • 8/14/2019 Pedi Neck Mass Slides 071031

    39/116

    TeratomaTeratoma

    Prognosis good if noPrognosis good if no

    respiratory compromiserespiratory compromise

    Usually wellUsually well

    differentiated anddifferentiated andrecurrence is uncommonrecurrence is uncommon

    Antenatal diagnosis isAntenatal diagnosis isroutine in developedroutine in developed

    worldworld

    WakhluWakhluA et alA et al 200013

  • 8/14/2019 Pedi Neck Mass Slides 071031

    40/116

    TeratomaTeratoma

    Proximity to vitalProximity to vital

    structures makes surgerystructures makes surgery

    technically demanding.technically demanding.

    Evaluate post op thyroidEvaluate post op thyroidand parathyroid function.and parathyroid function.

    WakhluWakhluA et alA et al 200013

  • 8/14/2019 Pedi Neck Mass Slides 071031

    41/116

    TeratomaTeratoma 3 germ layers3 germ layers

    Arise fromArise from

    pluripotentpluripotent

    cells andcells and

    ectopicectopicembryogenicembryogenic

    nonnon--germgermcellscells

    WakhluWakhluA et alA et al 200013

  • 8/14/2019 Pedi Neck Mass Slides 071031

    42/116

    TeratomaTeratoma 3 germ layers3 germ layers

    WakhluWakhluA et alA et al 200013

  • 8/14/2019 Pedi Neck Mass Slides 071031

    43/116

    TeratomaTeratoma 3 germ layers3 germ layers

    WakhluWakhluA et alA et al 200013

  • 8/14/2019 Pedi Neck Mass Slides 071031

    44/116

    HypopharyngealHypopharyngeal TeratomaTeratoma

    calcified calcification and fat

    Malik et al 20026

    T tT t

  • 8/14/2019 Pedi Neck Mass Slides 071031

    45/116

    TeratomaTeratomaT1 MRIT1 MRI

    Fatty

    Calcified

    Gujar and Mukherji 20045

  • 8/14/2019 Pedi Neck Mass Slides 071031

    46/116

    LymphangiomaLymphangioma Benign,Benign, multiloculatedmultiloculated, soft, soft

    Posterior neck triangle predominancePosterior neck triangle predominance

    MultiMulti--septatedseptated, insinuating lesions, insinuating lesions

    Infiltrate and cross tissue planesInfiltrate and cross tissue planes

    Most occur by 2 yrs of ageMost occur by 2 yrs of age

    Incidence: 1 in 6,000 to 16,000 birthsIncidence: 1 in 6,000 to 16,000 births

    BurezqBurezq 200614Head and and Neck Surgery,Head and and Neck Surgery, 200615

  • 8/14/2019 Pedi Neck Mass Slides 071031

    47/116

    Lymphatic Vascular malformationLymphatic Vascular malformation

    T1 MRIT1 MRI

    High signalHigh signal

    representsrepresentsproteinaceousproteinaceousfluidfluid

    Crosses tissueCrosses tissueplanesplanes

    Gujar and Mukherji 20045

  • 8/14/2019 Pedi Neck Mass Slides 071031

    48/116

    CentrifugalCentrifugal vsvs CentripetalCentripetalCentrifugal theoryCentrifugal theory

    the lymphatic system develops asthe lymphatic system develops as mesenchymalmesenchymalspaces that later coalesce into a system ofspaces that later coalesce into a system ofvessels that eventually join the venous system.vessels that eventually join the venous system.

    Centripetal theoryCentripetal theory

    jugular and posteriorjugular and posterior lymphaticslymphatics form asform asoutgrowths of endothelium from veins into theoutgrowths of endothelium from veins into thesurroundingsurrounding mesenchymemesenchyme..

    BurezqBurezq 200614

  • 8/14/2019 Pedi Neck Mass Slides 071031

    49/116

    ClassificationClassificationSize:Size:

    MicrocysticMicrocystic: capillary: capillary lymphangiomaslymphangiomas lesions are less than 1 cm in diameterlesions are less than 1 cm in diameter

    MacrocysticMacrocystic: cystic: cystic hygromashygromas cysts are larger than 1 cmcysts are larger than 1 cm

    CysticCystic hygromashygromas #1 type of#1 type oflymphangiomalymphangioma

    Gross et al, 200616

  • 8/14/2019 Pedi Neck Mass Slides 071031

    50/116

    CysticCystic HygromaHygroma

    NoncalcifiedNoncalcified

    SeptatedSeptated onon

    U/SU/S

    Malik et al 20026

  • 8/14/2019 Pedi Neck Mass Slides 071031

    51/116

    Cystic CompositionCystic Composition 55--yearyear--old boy withold boy with

    lymphangiomalymphangioma

    L parotid &L parotid &

    parapharyngealparapharyngeal spacespace mixed macromixed macro--

    andmicrocysticandmicrocystic typetype

    Treated by surgicalTreated by surgicalresectionresection

    Gross et al, 200616

    Type 1 First Branchial Cleft CystType 1 First Branchial Cleft CystLymphangiomaLymphangioma

  • 8/14/2019 Pedi Neck Mass Slides 071031

    52/116

    Type 1 First Branchial Cleft CystType 1 First Branchial Cleft Cyst

    Both MRI and CT havedifficulty distinguishingbranchial cleft cyst from

    lymphangioma inchildren.

    BranstetterBranstetter, 20069

    LymphangiomaLymphangioma

    mass

    auricle

    parotid

    BurezqBurezq et al 2006et al 2006

  • 8/14/2019 Pedi Neck Mass Slides 071031

    53/116

    BurezqBurezq et al, 2006et al, 2006(expert opinion)(expert opinion)

    1. Error in establishing a communication1. Error in establishing a communication

    between the lymphatic and venous systembetween the lymphatic and venous system CysticCystic hygromahygroma

    2. Error in morphogenesis of lymphatic system:2. Error in morphogenesis of lymphatic system:

    this includes other types of lymphaticthis includes other types of lymphatic

    malformationsmalformations microcysticmicrocystic,, macrocysticmacrocystic and mixed lymphatic lesionsand mixed lymphatic lesions

    BurezqBurezq 200614

  • 8/14/2019 Pedi Neck Mass Slides 071031

    54/116

    ManagementManagement -- ControversialControversial Spontaneous resolution?Spontaneous resolution?

    Formation of new lymphatic channels?Formation of new lymphatic channels?

    Serial aspiration?Serial aspiration?

    SclerosantSclerosantAgents?Agents? OKOK--432 (432 (lyophiliziedlyophilizied mixture of lowmixture of low--virulence group Avirulence group ASterpSterp

    pyogenspyogens

    Surgical Excision?Surgical Excision? Is the surgical risk out weigh the benefit in a benign lesionIs the surgical risk out weigh the benefit in a benign lesion

    BurezqBurezq 200614

  • 8/14/2019 Pedi Neck Mass Slides 071031

    55/116

    Success with Serial AspirationsSuccess with Serial Aspirations

    BurezqBurezq 200614

  • 8/14/2019 Pedi Neck Mass Slides 071031

    56/116

    Success with OKSuccess with OK--432432

    Supraclavicular macrocysticlymphangioma

    Gross et al, 200616

  • 8/14/2019 Pedi Neck Mass Slides 071031

    57/116

    HemangiomaHemangioma Less than 1/3 present at birthLess than 1/3 present at birth

    Usually seen in 1Usually seen in 1stst few months of life andfew months of life and

    enlarge progressivelyenlarge progressively

    90% cases involutes spontaneously90% cases involutes spontaneously

    SclerosingSclerosing agents controversialagents controversial

  • 8/14/2019 Pedi Neck Mass Slides 071031

    58/116

    GlutGlut--11

    erythrocyteerythrocyte--type glucose transportertype glucose transporter

    found only infound only in microvascularmicrovascular endothelia of bloodendothelia of bloodtissuetissuebarriers such as in the central nervous system, retina,barriers such as in the central nervous system, retina,placenta,placenta, ciliaryciliary muscle, andmuscle, and endoneuriumendoneurium of peripheralof peripheralnervesnerves

    HemangiomasHemangiomas stain consistently for Glutstain consistently for Glut--1, in all stages1, in all stagesof development and involution whereas vascularof development and involution whereas vascularmalformations did notmalformations did not

    Mo et al, 200617

    MacArther, 200618

  • 8/14/2019 Pedi Neck Mass Slides 071031

    59/116

    Pediatric Neck MassesPediatric Neck Masses 1. Congenital lesions1. Congenital lesions

    2. Inflammatory lesions2. Inflammatory lesions

    3. Non3. Non--inflammatory benign lesionsinflammatory benign lesions

    4. Benign4. Benign neoplasmsneoplasms

    5. Malignant5. Malignant neoplasmsneoplasms

  • 8/14/2019 Pedi Neck Mass Slides 071031

    60/116

    Pediatric Neck MassesPediatric Neck Masses 1. Congenital lesions1. Congenital lesions

    2. Inflammatory lesions2. Inflammatory lesions

    3. Non3. Non--inflammatory benign lesionsinflammatory benign lesions

    4. Benign4. Benign neoplasmsneoplasms

    5. Malignant5. Malignant neoplasmsneoplasms

  • 8/14/2019 Pedi Neck Mass Slides 071031

    61/116

    2. Inflammatory Lesions2. Inflammatory LesionsReactive lympadenopathy 71 16%

    Undetermined etiology 66 15%Sinus histiocytosis 5 1%

    Granulomatous disease 32 7%Atypical mycobacteria 20 4%

    Cat scratch disease 6 1%Toxoplasmosis 2Sarcoid 2

    Suppurative lympadenitis 10 2%Sialadenitis 5 1%

    When does cervicalWhen does cervical

  • 8/14/2019 Pedi Neck Mass Slides 071031

    62/116

    lymphadenopathylymphadenopathy require FNA?require FNA?

    Benign reactive lymph node may persistBenign reactive lymph node may persist

    for weeks to monthsfor weeks to months

    Lymphoma can present the same wayLymphoma can present the same way

    Rapkiewicz et al 200721

  • 8/14/2019 Pedi Neck Mass Slides 071031

    63/116

    To FNA or not to FNA?To FNA or not to FNA? ReactiveReactive lymphadenopathylymphadenopathy the most likelythe most likely

    etiology of pediatric neck massesetiology of pediatric neck masses

    DiagnosticDiagnostic dilemadilema: a mass that does not: a mass that does notresolve after initial treatmentresolve after initial treatment

    Rapkiewicz et al 200721

  • 8/14/2019 Pedi Neck Mass Slides 071031

    64/116

    FNA ancillary studiesFNA ancillary studies Gram stain, cultureGram stain, culture

    Acid fast stainAcid fast stain

    ImunocytochemistryImunocytochemistry

    CytogeneticsCytogenetics

    Rapkiewicz et al 200721

    Limitations to FNA

  • 8/14/2019 Pedi Neck Mass Slides 071031

    65/116

    Limitations to FNALimitations to FNA

    A lesion may not be homogenousA lesion may not be homogenous

    FNA samples only part of the massFNA samples only part of the mass

    May miss the true lesionMay miss the true lesion

    Unable to appreciate histologicalUnable to appreciate histological

    architecturearchitecture

    Rapkiewicz et al 200721

    Time to contemplate open biopsyTime to contemplate open biopsy

  • 8/14/2019 Pedi Neck Mass Slides 071031

    66/116

    Enlarging massEnlarging mass

    Poor response to medical treatmentPoor response to medical treatment

    Suspicious clinical courseSuspicious clinical course

    Unusual image findingsUnusual image findings

    Systemic symptomsSystemic symptoms

    Rapkiewicz et al 200721

    Case F R

  • 8/14/2019 Pedi Neck Mass Slides 071031

    67/116

    CaseCase

    F.R.F.R.

    88 y/oy/o female,female, hxhx + PPD several yrs prior+ PPD several yrs prior

    Presents with R cervicalPresents with R cervical adenopathyadenopathy

    FNA suggestsFNA suggests granulomagranuloma

    Repeat FNARepeat FNA--> same result> same result

    AFB stain and cultures negativeAFB stain and cultures negative

    ClarithromycinClarithromycin andand ethambutolethambutol startedstarted

    Rapkiewicz et al 200721

    Case F R

  • 8/14/2019 Pedi Neck Mass Slides 071031

    68/116

    CaseCase

    F.R.F.R.

    AdenopathyAdenopathy and pain increasedand pain increased

    Third FNA nonThird FNA non--diagnosticdiagnostic

    CT shows bulky homogenousCT shows bulky homogenous

    lymphadenopathylymphadenopathy of R upper spinalof R upper spinalaccessory and upper jugular chains.accessory and upper jugular chains.

    Open biopsy displayedOpen biopsy displayed Hodgkin'sHodgkin'slymphoma.lymphoma.

    Rapkiewicz et al 200721

    Reactive Lymphadenopathy

  • 8/14/2019 Pedi Neck Mass Slides 071031

    69/116

    ReactiveReactive

    LymphadenopathyLymphadenopathy

    33--yearyear--old childold child

    MultipleMultiple hypoechoichypoechoiclesionslesions

    variable shape andvariable shape andsizessizes

    consistent withconsistent withreactive lymphreactive lymphnodesnodes

    Malik et al 20026

    Enlarged Lymph Node

  • 8/14/2019 Pedi Neck Mass Slides 071031

    70/116

    Enlarged Lymph NodeEnlarged Lymph Node

    NonspecificNonspecific

    Cause:Cause:

    cryptococcalcryptococcal

    adenitisadenitis

    YeastlikeYeastlikefungusfungus

    Gujar and Mukherji 20045

    AtypicalAtypical mycobacteriamycobacteria: ex:: ex:

  • 8/14/2019 Pedi Neck Mass Slides 071031

    71/116

    cryptococcuscryptococcus

    Saprobe inSaprobe in

    naturenature

    worldwideworldwide

    distributiondistribution Found in soilFound in soil

    Portal of entryPortal of entryis lungis lung

    AtypicalAtypical mycobacteriamycobacteria: ex:: ex:

  • 8/14/2019 Pedi Neck Mass Slides 071031

    72/116

    cryptococcuscryptococcus Associated w/Associated w/

    AIDSAIDS organorgan

    transplantationtransplantation

    LymphoreticularLymphoreticulardiseasesdiseases

    pts lackpts lack

    apprarentapprarentpredisposingpredisposingfactorsfactors

    BartonellaBartonella henselaehenselae

  • 8/14/2019 Pedi Neck Mass Slides 071031

    73/116

    BartonellaBartonella henselaehenselae

    HypoechoicHypoechoic massesmasses

    with irregular rim ofwith irregular rim ofisoechoicisoechoic tissuetissue

    Biopsy: Cat ScratchBiopsy: Cat Scratch

    DiseaseDisease

    Malik et al 20026

    BartonellaBartonella henselaehenselae

  • 8/14/2019 Pedi Neck Mass Slides 071031

    74/116

    BartonellaBartonella henselaehenselae

    GramGram coccobacilluscoccobacillus

    22-- 14 day incubation14 day incubation

    DxDx: requires prolonged: requires prolonged

    incubation (2 + weeks)incubation (2 + weeks) Rx: erythromycin 1Rx: erythromycin 1--4 m4 m

    (unclear efficacy)(unclear efficacy)

    Normally benign courseNormally benign course

    Malik et al 20026

    In heart valve

    PeritonsillarPeritonsillar AbcessAbcess

  • 8/14/2019 Pedi Neck Mass Slides 071031

    75/116

    PeritonsillarPeritonsillarAbcessAbcess

    Soft tissue density inSoft tissue density in

    submentalsubmental spacespace

    Malik et al 20026

    RetropharyngealRetropharyngeal

  • 8/14/2019 Pedi Neck Mass Slides 071031

    76/116

    AbscessAbscess Widening ofWidening of

    prevertebralprevertebral spacespace

    Malik et al 20026

    Retropharyngeal Space AbscessRetropharyngeal Space Abscess

  • 8/14/2019 Pedi Neck Mass Slides 071031

    77/116

    et op a y gea Space bscessp y g p

    Gujar and Mukherji 20045

  • 8/14/2019 Pedi Neck Mass Slides 071031

    78/116

    RetropharyngealPeritonsillar

    Malik et al 20026

    SppurativeSppurative Cervical AdenitisCervical Adenitis

  • 8/14/2019 Pedi Neck Mass Slides 071031

    79/116

    pppp

    hypoechoic

    Malik et al 20026

    Thyroid AbscessThyroid Abscess

  • 8/14/2019 Pedi Neck Mass Slides 071031

    80/116

    yy

    Malik et al 20026

    Pediatric Neck MassesPediatric Neck Masses

  • 8/14/2019 Pedi Neck Mass Slides 071031

    81/116

    1. Congenital lesions1. Congenital lesions

    2. Inflammatory lesions2. Inflammatory lesions

    3. Non3. Non--inflammatory benign lesionsinflammatory benign lesions

    4. Benign4. Benign neoplasmsneoplasms

    5. Malignant5. Malignant neoplasmsneoplasms

    Pediatric Neck MassesPediatric Neck Masses

  • 8/14/2019 Pedi Neck Mass Slides 071031

    82/116

    1. Congenital lesions1. Congenital lesions

    2. Inflammatory lesions2. Inflammatory lesions

    3. Non3. Non--inflammatory benign lesionsinflammatory benign lesions

    4. Benign4. Benign neoplasmsneoplasms

    5. Malignant5. Malignant neoplasmsneoplasms

    3. Non3. Non--inflammatory Benigninflammatory Benign

  • 8/14/2019 Pedi Neck Mass Slides 071031

    83/116

    LesionsLesionsInclusion cyst 13 3%

    Fibromatosis 9 2%Keloid 1

    Inclusion CystInclusion Cyst

  • 8/14/2019 Pedi Neck Mass Slides 071031

    84/116

    AcquiredAcquired dermoiddermoid cystscysts

    result from a part of the skin being traumaticallyresult from a part of the skin being traumaticallyimplanted in the deeper layers afterimplanted in the deeper layers after ectopicectopic formationformationof aof a dermal cyst l ined w ithdermal cyst l ined w ith squamoussquamousepitheliumepithelium ..

    Congenital inclusionCongenital inclusion dermoiddermoid cysts form alongcysts form alongthe lines of embryologic fusion and contain boththe lines of embryologic fusion and contain both

    dermal and epidermal derivatives.dermal and epidermal derivatives. DermoidDermoid cysts of the head and neck are thought to becysts of the head and neck are thought to be

    the congenital inclusion type.the congenital inclusion type.

    Pryor et al 200512

    Inclusion CystInclusion Cyst

  • 8/14/2019 Pedi Neck Mass Slides 071031

    85/116

    many cysts originate from themany cysts originate from the infundibularinfundibular

    portion of the hair follicle, and the moreportion of the hair follicle, and the moregeneral term,general term, epidermoidepidermoid cystcyst, is favored, is favored

    Becker et a, 200519

    Epidermal Inclusion CystEpidermal Inclusion Cyst

  • 8/14/2019 Pedi Neck Mass Slides 071031

    86/116

    Cyst containing keratinous material true epidermis with a granular layerand adjacent laminated keratinousmaterial

    Becker et al, 200519

    TorticollisTorticollis

  • 8/14/2019 Pedi Neck Mass Slides 071031

    87/116

    FibromatosisFibromatosis ColliColli

  • 8/14/2019 Pedi Neck Mass Slides 071031

    88/116

    SCMSCM

    IsoechoicIsoechoic massmass

    CT showsCT shows isodenseisodense

    mass R sidemass R side

    Note normal SCM onNote normal SCM on

    L sideL side

    Malik et al 20026

    FibromatosisFibromatosis ColliColli -- FNAFNA

  • 8/14/2019 Pedi Neck Mass Slides 071031

    89/116

    PaucicellularPaucicellular

    specimenspecimen

    Bland spindleBland spindlecell cytologycell cytology

    r/or/o nodularnodular fascitisfascitis andand fibrosarcomafibrosarcoma

    Rapkiewicz et al 200721

    FibromatosisFibromatosis ColliColli

  • 8/14/2019 Pedi Neck Mass Slides 071031

    90/116

    r/or/o nodularnodular fascitisfascitis andand fibrosarcomafibrosarcoma

    Ro 200720

  • 8/14/2019 Pedi Neck Mass Slides 071031

    91/116

    Moir. 20042

    Pediatric Neck MassesPediatric Neck Masses

  • 8/14/2019 Pedi Neck Mass Slides 071031

    92/116

    1. Congenital lesions1. Congenital lesions

    2. Inflammatory lesions2. Inflammatory lesions

    3. Non3. Non--inflammatory benign lesionsinflammatory benign lesions

    4. Benign4. Benign neoplasmsneoplasms

    5. Malignant5. Malignant neoplasmsneoplasms

    Pediatric Neck MassesPediatric Neck Masses

  • 8/14/2019 Pedi Neck Mass Slides 071031

    93/116

    1. Congenital lesions1. Congenital lesions

    2. Inflammatory lesions2. Inflammatory lesions

    3. Non3. Non--inflammatory benign lesionsinflammatory benign lesions

    4. Benign4. Benign neoplasmsneoplasms

    5. Malignant5. Malignant neoplasmsneoplasms

    4. Benign Neoplasms4. Benign Neoplasms

  • 8/14/2019 Pedi Neck Mass Slides 071031

    94/116

    Neurofibroma 3 1%

    Lipoma 3 1%Lipoblastoma 2Paraganglioma 1Goiter 1Benign mixed tumor 1Osteoblastoma 1

    NeurofibromaNeurofibroma

  • 8/14/2019 Pedi Neck Mass Slides 071031

    95/116

    solitary lesionsolitary lesion

    vsvs part of the generalized syndrome ofpart of the generalized syndrome of

    neurofibromatosisneurofibromatosis NFNF--1, aka von Recklinghausen disease1, aka von Recklinghausen disease

    NFNF--22

    Believed to arise from Schwann cell butBelieved to arise from Schwann cell butorigin uncertainorigin uncertain

    NeurofibromaNeurofibroma

  • 8/14/2019 Pedi Neck Mass Slides 071031

    96/116

    solitary lesionsolitary lesion

    vsvs part of the generalized syndrome ofpart of the generalized syndrome of

    neurofibromatosisneurofibromatosis NFNF--1, aka von Recklinghausen disease1, aka von Recklinghausen disease

    NFNF--22

    Believed to arise from Schwann cell butBelieved to arise from Schwann cell butorigin uncertainorigin uncertain

    NeurofibromaNeurofibroma

  • 8/14/2019 Pedi Neck Mass Slides 071031

    97/116

    T2 MRIT2 MRI

    Central low T2Central low T2

    signal issignal ischaracteristic ofcharacteristic of

    neurofibromasneurofibromas

    Gujar and Mukherji 20045

    LipomaLipoma

  • 8/14/2019 Pedi Neck Mass Slides 071031

    98/116

    LipoblastomaLipoblastoma

    http://www.microscopyu.com/galleries/pathology/lipomalarge.html
  • 8/14/2019 Pedi Neck Mass Slides 071031

    99/116

    Rare benignRare benign mesynchymalmesynchymal

    tumor oftumor ofembryonalembryonal fatfat

    May clinically andMay clinically and radiologicallyradiologicallymimic amimic a hemangiomahemangioma

    Collections ofCollections oflipoblastslipoblastsmultivuolatedmultivuolated w/ round nucleiw/ round nuclei

    FNA

    LipoblastomaLipoblastoma

  • 8/14/2019 Pedi Neck Mass Slides 071031

    100/116

    ResemblesResembles

    embryological adiposeembryological adiposetissuetissue

    Surgical specimen

    LipomaLipoma LipoblastomaLipoblastoma

    http://www.microscopyu.com/galleries/pathology/lipomalarge.html
  • 8/14/2019 Pedi Neck Mass Slides 071031

    101/116

    NeonatalNeonatal

    GoiterGoiter

    http://www.microscopyu.com/galleries/pathology/lipomalarge.html
  • 8/14/2019 Pedi Neck Mass Slides 071031

    102/116

    GoiterGoiter

    CT shows large peripheral rimCT shows large peripheral rimenhancing, low attenuationenhancing, low attenuationmassmass

    1: 4000 live births1: 4000 live births

    Female 2x = MaleFemale 2x = Malepredominancepredominance

    Delayed ossification at boneDelayed ossification at boneendsends

    Malik et al, 20026Rovet et al, 200310

  • 8/14/2019 Pedi Neck Mass Slides 071031

    103/116

    Pediatric Neck MassesPediatric Neck Masses

  • 8/14/2019 Pedi Neck Mass Slides 071031

    104/116

    1. Congenital lesions1. Congenital lesions

    2. Inflammatory lesions2. Inflammatory lesions

    3. Non3. Non--inflammatory benign lesionsinflammatory benign lesions

    4. Benign4. Benign neoplasmsneoplasms

    5. Malignant5. Malignant neoplasmsneoplasms

    5. Malignant Neoplasms5. Malignant Neoplasms

  • 8/14/2019 Pedi Neck Mass Slides 071031

    105/116

    Lymphoma 34 8%Hodgkin's 23 5%

    Non-Hodkin's 11 2%Thyroid Carcinoma 6 1%Rhabdomyosarcoma 2

    Neuroblastoma 2Fibrous histiocytoma 1Acinic cell carcinoma 1Histiocytosis X 1Chloroma 1

    LymphomaLymphoma

  • 8/14/2019 Pedi Neck Mass Slides 071031

    106/116

    Third most common pediatric cancerThird most common pediatric cancer

    Incidence: 11Incidence: 11--20 per million children20 per million children

    Geographical varianceGeographical variance 50 % of50 % of

    childhood cancers in equatorial Africachildhood cancers in equatorial Africa Due to high incidence ofDue to high incidence ofBurkittBurkittss lymphomalymphoma

    Male predominance 2.5:1Male predominance 2.5:1

    Beware theBeware the supraclavicularsupraclavicular mass!mass!

  • 8/14/2019 Pedi Neck Mass Slides 071031

    107/116

    35% of patients35% of patients

    with H&Nwith H&Nlymphomalymphomapresent with apresent with asupraclavicularsupraclavicular

    massmass

    35% of pts with35% of pts with

    suprclavicularsuprclavicularmasses hadmasses hadlymphomalymphoma

    Turkington et al 200522 TorsiglieriTorsiglieri et al., 1988et al., 198822

    NeuroblastomaNeuroblastoma

  • 8/14/2019 Pedi Neck Mass Slides 071031

    108/116

    NoncontrastNoncontrast T1T1

    MRIMRI

    Mass (arrow)Mass (arrow)lateral to carotidlateral to carotid

    arteryartery(arrowhead).(arrowhead).

    Gujar and Mukherji 20045

    RhabdomyosarcomaRhabdomyosarcoma -- CTCT

  • 8/14/2019 Pedi Neck Mass Slides 071031

    109/116

    Ill definedIll defined

    enhancing softenhancing soft

    tissue densitytissue density

    areas of necrosisareas of necrosis

    Malik et al 20026

    RhabdomyosarcomaRhabdomyosarcoma

    of the Masticator Spaceof the Masticator Space

  • 8/14/2019 Pedi Neck Mass Slides 071031

    110/116

    pp

    NonNon--contrast T1contrast T1 intermediateintermediatesignalsignal

    T2T2 increased signalincreased signal

    Gujar and Mukherji 20045

    TorsiglieriTorsiglieri et al., 1988et al., 198822

  • 8/14/2019 Pedi Neck Mass Slides 071031

    111/116

    Inflammatory

    lesions

    27%

    Malignant

    neoplasms, 11%

    Benign neoplasms

    3%

    Non-infammatory

    benign lesions

    5%

    Congenital lesions

    54%

    N= 445

    Total % oftotal

    Congeital lesions 244 55%Branchial cleft cyst 78 18%Thyroglossal duct cyst 73 16%Dermoid cyst 43 10%Lymphangioma 34 8%Hemangioma 10 2%

    Non-infammatory benignlesions

    23 5%

    Inclusion cyst 13 3%Fibromatosis 9 2%

    Keliod 1

  • 8/14/2019 Pedi Neck Mass Slides 071031

    112/116

    gTeratoma 2Bronchogenic cyst 2Thymic cyst 1

    Myelomeningocele 1Inflammatory lesions 118 27%

    Reactive lympadenopathy 71 16%Undetermined etiology 66 15%Sinus histiocytosis 5 1%

    Granulomatous disease 32 7%Atypical mycobacteria 20 4%Cat scratch disease 6 1%Toxoplasmosis 2Sarcoid 2

    Suppurative lympadenitis 10 2%

    Sialadenitis 5 1%

    Benign neoplasms 12 3%Neurofibroma 3 1%Lipoma 3 1%Lipoblastoma 2Paraganglioma 1Goiter 1Benign mixed tumor 1Osteoblastoma 1

    Malignant neoplasms 48 11%Lymphoma 34 8%Hodgkin's 23 5%Non-Hodkin's 11 2%

    Thyroid Carcinoma 6 1%Rhabdomyosarcoma 2

    Neuroblastoma 2Fibrous histiocytoma 1Acinic cell carcinoma 1Histiocytosis X 1Chloroma 1

    Total 445TorsiglieriTorsiglieri et al., 1988et al., 198822

    ConclusionsConclusions

  • 8/14/2019 Pedi Neck Mass Slides 071031

    113/116

    Initial evaluation (H&P)Initial evaluation (H&P)

    Congenital, infectious, benign, malignantCongenital, infectious, benign, malignant Beware of tuberculosis, cat scratchBeware of tuberculosis, cat scratch

    disease, atypical infectionsdisease, atypical infections

    Beware of systemic symptomsBeware of systemic symptoms

    Beware theBeware the supraclavicularsupraclavicular massmass

    Consider FNA or biopsy in the mass thatConsider FNA or biopsy in the mass thatdoes not resolve with treatment.does not resolve with treatment.

    BibliographyBibliography

  • 8/14/2019 Pedi Neck Mass Slides 071031

    114/116

    1.1. NeoReviews.orgNeoReviews.org,,http://neoreviews.aappublications.org/case27/case.shtmlhttp://neoreviews.aappublications.org/case27/case.shtml, 10/18/07., 10/18/07.

    2.2.

    TorsiglieriTorsiglieri

    AJAJ

    JrJr

    , Tom LW, Ross AJ 3rd, Wetmore RF, Handler SD,, Tom LW, Ross AJ 3rd, Wetmore RF, Handler SD,

    PotsicPotsic

    WP. Pediatric neck masses: guidelines for evaluation.WP. Pediatric neck masses: guidelines for evaluation. IntInt JJ PediatrPediatrOtorhinolaryngolOtorhinolaryngol.. 1988 Dec;16(3):1991988 Dec;16(3):199--210.210.

    3.3. Nicollas R, Guelfucci B, Roman S, Triglia JM.Nicollas R, Guelfucci B, Roman S, Triglia JM. Congenital cysts andCongenital cysts andfistulas of the neck.fistulas of the neck. IntInt JJ PediatrPediatrOtorhinolaryngolOtorhinolaryngol. 2000 Sep. 2000 Sep29;55(2):11729;55(2):117--24.24.

    4.4. Schroeder JWSchroeder JW JrJr,, MohyuddinMohyuddin N,N, MaddalozzoMaddalozzo J. Branchial anomalies inJ. Branchial anomalies inthe pediatric population.the pediatric population. OtolaryngolOtolaryngol Head NeckHead Neck SurgSurg. 2007. 2007Aug;137(2):289Aug;137(2):289--95.95.

    5.5. GujarGujarS, Gandhi D,S, Gandhi D, MukherjiMukherji SK. Pediatric head and neck masses. TopSK. Pediatric head and neck masses. TopMagnMagn ResonReson Imaging. 2004 Apr;15(2):95Imaging. 2004 Apr;15(2):95--101.101.

    6.6. MalikMalikA,A, OditaOdita J, Rodriguez J,J, Rodriguez J, HardjasudarmaHardjasudarma M. Pediatric neck masses:M. Pediatric neck masses:a pictorial review for practicing radiologists.a pictorial review for practicing radiologists. CurrCurrProblProbl DiagnDiagn RadiolRadiol..2002 Jul2002 Jul--Aug;31(4):146Aug;31(4):146--57.57.

    Bibliography (cont)Bibliography (cont)

    http://neoreviews.aappublications.org/case27/case.shtmlhttp://neoreviews.aappublications.org/case27/case.shtmlhttp://neoreviews.aappublications.org/case27/case.shtmlhttp://neoreviews.aappublications.org/case27/case.shtmlhttp://neoreviews.aappublications.org/case27/case.shtmlhttp://neoreviews.aappublications.org/case27/case.shtmlhttp://neoreviews.aappublications.org/case27/case.shtml
  • 8/14/2019 Pedi Neck Mass Slides 071031

    115/116

    7.7. ROH,ROH, JL.JL.LymphomasLymphomas of the head and neck in the pediatricof the head and neck in the pediatricpopulation, International journal of pediatricpopulation, International journal of pediatric otorhinolaryngologyotorhinolaryngology,,

    Volume 71, Issue 9, September 2007, Pages 1471Volume 71, Issue 9, September 2007, Pages 1471--1477.1477.8.8. MoirMoirCR. Neck Cysts, Sinuses,CR. Neck Cysts, Sinuses, ThyroglossalThyroglossal DuctDuct CytsCyts, and, and

    Branchial Cleft Anomalies, Operative Tech in GenBranchial Cleft Anomalies, Operative Tech in Gen SurgSurg, v 6, n 4, v 6, n 4(Dec), 2004: 281(Dec), 2004: 281--295.295.

    9.9. BranstetterBranstetterBF, Branchial Cleft Cysts,BF, Branchial Cleft Cysts, EmedicineEmedicine,,

    http://www.emedicine.com/radio/topic107.htmhttp://www.emedicine.com/radio/topic107.htm Oct 24, 2006.Oct 24, 2006.10.10. RovetRovet JF. Congenital hypothyroidism: an analysis of persistingJF. Congenital hypothyroidism: an analysis of persisting

    deficits and associated factors. Childdeficits and associated factors. Child NeuropsycholNeuropsychol. 2002. 2002Sep;8(3):150Sep;8(3):150--62.62.

    11.11. ThyroglossalThyroglossal Duct Cyst, LearningDuct Cyst, Learning Radiology.comRadiology.com,,http://www.learningradiology.com/archives06/COW%20231http://www.learningradiology.com/archives06/COW%20231--Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlThyroglossal%20Duct%20Cyst/tgdccorrect.html, accessed, accessed10/30/2007.10/30/2007.

    http://www.emedicine.com/radio/topic107.htmhttp://www.emedicine.com/radio/topic107.htmhttp://www.emedicine.com/radio/topic107.htmhttp://www.emedicine.com/radio/topic107.htmhttp://www.emedicine.com/radio/topic107.htmhttp://www.emedicine.com/radio/topic107.htmhttp://www.emedicine.com/radio/topic107.htmhttp://www.emedicine.com/radio/topic107.htmhttp://www.learningradiology.com/archives06/COW%20231-Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlhttp://www.learningradiology.com/archives06/COW%20231-Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlhttp://www.learningradiology.com/archives06/COW%20231-Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlhttp://www.learningradiology.com/archives06/COW%20231-Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlhttp://www.learningradiology.com/archives06/COW%20231-Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlhttp://www.learningradiology.com/archives06/COW%20231-Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlhttp://www.learningradiology.com/archives06/COW%20231-Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlhttp://www.learningradiology.com/archives06/COW%20231-Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlhttp://www.learningradiology.com/archives06/COW%20231-Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlhttp://www.learningradiology.com/archives06/COW%20231-Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlhttp://www.learningradiology.com/archives06/COW%20231-Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlhttp://www.learningradiology.com/archives06/COW%20231-Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlhttp://www.learningradiology.com/archives06/COW%20231-Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlhttp://www.learningradiology.com/archives06/COW%20231-Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlhttp://www.learningradiology.com/archives06/COW%20231-Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlhttp://www.learningradiology.com/archives06/COW%20231-Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlhttp://www.learningradiology.com/archives06/COW%20231-Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlhttp://www.learningradiology.com/archives06/COW%20231-Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlhttp://www.learningradiology.com/archives06/COW%20231-Thyroglossal%20Duct%20Cyst/tgdccorrect.htmlhttp://www.emedicine.com/radio/topic107.htm
  • 8/14/2019 Pedi Neck Mass Slides 071031

    116/116

    http://www.histopathology-india.net/FC.htmhttp://www.emedicine.com/derm/topic860.htm