ESMO PRECEPTORSHIP · 2020. 1. 29. · 1/3 of patients with normal lymph node morphology have nodal...
Transcript of ESMO PRECEPTORSHIP · 2020. 1. 29. · 1/3 of patients with normal lymph node morphology have nodal...
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ESMO PRECEPTORSHIPON BREAST CANCER
MD Associate professor Kristina Lång, Lund University
Lisbon, 11-12 October 2019
Breast imaging
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DISCLOSURE OF INTEREST
Speaker fees from Siemens Healthineers
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Symptoms Screening finding
Diagnosis
Staging
Preoperative assessment
Postoperative assessment and
surveillance
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Symptoms Screening finding
Diagnosis
Staging
Preoperative assessment
Postoperative assessment and
surveillance
Symptoms of breast cancer In the screening age group: >60% of
the cancers are detected in screening
1/2 1/2
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Symptoms Screening finding
Diagnosis
Other imaging techniques: TomosynthesisMagnetic resonance imaging (MRI)Contrast enhanced mammography
Elastography
Breast-CT…
MammographyUltrasoundBiopsy
+ physical examination = Triple assessment
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Röntgenskuggbild
• One of the most common x-ray examination
• Measures the attenuation differences of tissues with different densities (radiolucent/radiodense = non dense/dense tissue)
• Tumour = high cellular density
Diagnosis Mammography
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Kenneth Libbrecht, Reports on Progress in Physics (2005)
Breasts are a heterogeneous organ
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Diagnosis
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The sensitivity of mammography is affected by:
• Exam technique – compression, positioning, image quality
• Tumour size and growth pattern (inv. lobular cancer)
• Experience of the radiologist (5000/year)
• Breast density (fatty vs fibroglandular and stromal tissue)
SensitivityRisk
• Increased risk of breast cancer in extremely dense breasts vs fatty breasts (x5)
Boyd NF et al N Eng J Med 2007
• Reduced sensitivity in dense breasts due to masking effect: – Non-dense breasts >70% sensitivity
– Dense breasts <50% sensitivity
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Diagnosis
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• Mediolateral oblique (MLO)
• Craniocaudal (CC)
• Lateral (ML eller LM)
• Additional views:- Magnification- Axilla
Standard views
MLO + CC = screening
MLO + CC + LM = clinical
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Diagnosis
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Breast compression
• Reduces scattered radiation/secondary radiation – lowers the radiation dose
• Reduces image noise
• Separates the structures in the breast – improves visualization
• Breast compression can be painful
• Influences the participation rate in screening (25–46% of those who chooses not to re-attend screening say that compression pain is the reason)
Whelehan et al. The effect of mammography pain on repeat participation in breast cancer screening: A systematic review. The Breast (2013)
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Diagnosis
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One mammogram = 3 months exposure to background radiation
www.iaea.org/Publications/Factsheets
Radiation dose in x-ray imaging
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Diagnosis
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www.iaea.org/Publications/Factsheets
Carcinogenic effect of irradiation is age dependent
• All symptomatic women >30 y.o.
• Women 25–30 y.o. only with a clinical suspicion of malignancy
• <25 y.o. only with a strong suspicion of malignancy
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Diagnosis
Adapted from Baral et al Cancer 1977
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• Soft tissue lesion
• Architectural distortion
• Asymmetry
• Microcalcifications
• Associated findings
Features of cancers
The most common appearance of an invasive cancer = a spiculated mass
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Diagnosis
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IDC FA
• 10–20% have benign features
• Often fast growing trippel negative breast cancers
• Medullar och mucinous cancer
TNBC
SpiculationsIrregular marginHigh densityEccentric localization
Round/ovalCircumbsribedSmooth marginIsodense/low densityHalo
Soft tissue lesion
Signs of malignancy Signs of benignity
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Diagnosis
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Architectural distortion
Multicentric invasive lobular cancer
Distortion of the breast parenchyma without a visible mass
Manisha Bahl et al. AJR (2015)
Can be caused by:
• Invasive cancer (lobular type)
• Benign lesions (radial scar, complex sclerosing adenosis)
• Postoperative distortion
Radial scar
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Diagnosis
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Microcalcifications
• Typical benign calcifications:
- Punctate or coarse
- Diffuse or isolated group
- Bilateral
• Typical malignant calcifications:
- New
- Thin, pleomorphic
- Linear, branching (ductal pattern)
- Isolated group or segmental
- Unilaterale
Benign
Malignant
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Diagnosis
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Associated findings
Lymphadenopathy
Unilateal oedema/skin thickening
Skin retraction
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Diagnosis
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Classification of imaging findings
ACR BI-RADS 5th ed.
Breast Imaging Reporting and Data System (BI-RADS)
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Diagnosis
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High-frequency sound waves are reflected in various degrees on different types of tissues
Ultrasonography
• Included in the standard diagnostic assessment
- Characterize lesions seen on mammography
- Lymph node assessment
• Guidance at interventional procedures
• Single modality for assessment of young women (<30)
Indications:
Lazzaro Spallanzani (1794)
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Diagnosis
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38-y.o. woman with a lump
Multifocal IDC
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Characterization of mammography findings
Mucinous cancer
Benign cyst
Case courtesy of Dr Mark Holland
Mammography Ultrasound
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Diagnosis
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Irregular shapeIndistinct marginsNon-parallell to the skinHypo- or heteroechogenicThrough transmission shadowNon-compressable
Malignant signs Benign signs
Round or ovalDistinct marginsParallell to the skinHomogen echogenicityThrough transmission enhancementCompressableIDC Cyst
”Taller than wide”
Feature analysis
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Diagnosis
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IDC IDC
Fibroadenoma TNBC
Cancer or not?
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Diagnosis
Kristina Lång, ESMO 2019
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Needles
Fine needle aspiration Core needle biopsy Vacuum assisted biopsy
Evacuate cystsLymphnode
Histological diagnosisReceptor status
Sparse microcalcificationsMR-guided biopsy
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Diagnosis
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Symptoms Screening finding
Diagnosis
Staging
Multidisciplinary conferences
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Size, multifocalityLymph node assessment
Metastasis screening
MammographyUltrasoundBiopsy
+ physical examination = Triple assessment
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Breast MRI
Peters et al. 2008 Radiology
Staging
T1W
T2W
Dynamic
MIP
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• Affects and measures the nuclear-magnetic resonance of water molecules
• Enables analysis of contrast dynamics (tumours = fast uptake + fast wash-out)
• Not affected by breast density
• High sensitivity (90%), lower specificity (72%)
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Bilateral ca?
56-y.o. woman with a family history of breast cancer Palpable lump left breast
Bilateral cancer?
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Staging
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• An MRI of the breast is not routinely recommended, but should be considered in cases of:
Indications
Breast MRI
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Staging
Cardoso F et al. Annals of Oncology (2019)
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• Preoperative MRI is clinical practice in many countries
• Tumour size can be underestimated with mammography and ultrasound, especially invasive lobular carcinoma
• MRI is accurate in estimating tumour extension (multifocality)
• A meta-analysis showed that the risk for recurrent disease was not reduced using preoperative MRI, but the risk of mastectomies increased
• COMICE-trial: RCT evaluating the effect on reoperation rates with and without preoperative MRI. No effect on reoperation rates (19% vs.19%, OR 0.96)
• MONET-trial: RCT of nonpalpable cancers with and without preoperative MRI. No difference in mastectomy frequency. Paradoxal higher rate of women with MRI that underwent reoperation (45% vs. 28%)
Preoperative assessment with MRI
Houssami N et al J Clin Oncol (2014)
Houssami N et al Breast Cancer Res Treat. (2017)
R Mann et al. Eur Radiol (2008)Clauser P, et al. Eur Radiol (2018)
L Turnbull et al. Lancet (2010)
”Breast MRI should not be used routinely for preoperative work-up of patients with nonpalpable breast cancer.”
N.H.G.M. Peters et al. Eur J Cancer (2010)
Invasive lobular cancer can be considered as an acceptable indication to preoperative MRI
EUSOMA guidelines, Eur J Cancer (2010)
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Staging
Kristina Lång, ESMO 2019
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Lymph node assessment
• Majority of sentinel lymph nodes are located in the lower part of the axilla (Level 1)
• Morphology och cortical thickness (>4 mm)
• Negative axillary US excludes advanced nodal disease with a NPV of 96%
• 1/3 of patients with normal lymph node morphology have nodal metastases
• Biopsy or cytology (+ clip marking)
Schipper RJ et al., Breast (2013)
Seidman H et al, CA Cancer J Clin (1987)
Britton P, Clin Radiol (2010)
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Staging
Kristina Lång, ESMO 2019
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Screening for distans metastasis
• Incidence of metastatic disease in early-stage BC <2%
• Whole body screening (CT) justified:
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Staging
• PET-CT (FDG) can be considered for inconclusive CT, for high-risk patients, inflammatory BC
• Less sensitive for lobular and low-grade cancers
Cardoso F et al. Annals of Oncology (2019)
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Symptoms Screening finding
Diagnosis
Staging
MammographyUltrasoundBiopsy
Preoperative assessment
Postoperative assessment
Localization proceduresAssessment of neoadjuvant therapy
Specimen radiographySurveillance
Multidisciplinary conferences
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Size, multifocalityLymph node assessment
Metastasis screening
+ physical examination = Triple assessment
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Preoperative assessment
76-y.o. woman with pain in her left breast
after a trauma
5 mm invasive tubular cancer
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Preoperative assessment
Postoperative assessment
Non-palpable lesions Margins?
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• Tumour size before, during and after treatment (longest diameter)
• Before treatment: radiopaque marker
• MRI is the most accurate method to evaluate treatment response (but depends on baseline appearance)
Assessment of neoadjuvant therapy
Before After
Preoperative assessment
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• Follow-up vary
• Yearly mammography +/- US (later routine screening)
• MRI may be indicated for young patients (dense breasts, hereditary risk)
• US can also be considered in the follow-up of lobular invasive carcinomas
Surveillance after treatmentPostoperative assessment
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• Assessment of primary tumour: Triple assessment = physical examination + imaging (mammography + US) + biopsy
• MRI has high sensitivity and is a valuable tool in selected cases
• Assessment of regional lymph nodes: Physical examination + US + biopsy/cytology if suspicious
• Assessment of metastatic disease: Imaging only if high tumour burden or indicative symptoms
Breast imaging Summary
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