44 yo Female with Chronic Polyuria and New Onset “Spells”
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44 yo Female with Chronic Polyuria and New Onset
“Spells”K Steffen, MD 2/11/04
Suggestion: Wait to look at handout until case presentation complete
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Past Medical History
• Anxiety/Depression• Irritable Bowel
Syndrome• Tension Headaches• Genital Herpes• Allergic rhinitis
• Female Sexual Dysfunction (low libido)
• Uncomplicated UTI approx 1998
• Chronic polyuria• PMS
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Past Surgical History
• Breast Augmentation 1992 with silicone implants
• Removal and replacement of silicone implants
• Liposuction of hips, abdomen, thighs
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Medications
• Wellbutrin SR 150/75 qod
• Celexa 20 mg qd• Allegra 60 mg prn• Rhinocort Nasal spray• Valtrex 5 mg bid• Estroven OTC
• Testosterone topical ointment
• Naprosyn prn• Tylenol prn• Livostin eye gtts prn• Bentyl prn
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Allergies
• Sulfa causes hives
• Alesse exacerbates headaches
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Social History
• Married, no children• Self-employed consultant• Spends winter months at 2nd home in Florida• 3-4X/week curves, walks, bikes, watches weight
carefully• “Former” (20 pack-yr) smoker, now
“occasionally”• Wine 5-8/week, no illicit drugs
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Family History
• Brother: Diabetes (pt worried she has this)
• Brother: Down’s syndrome
• Father: EtOHism, died of liver cancer
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Visit to UW Health 8/28/02
• CC: urinary frequency with abdominal bloating (Add’l: PMS symptoms, testosterone not
helping libido, vaginal dryness)Urinalysis:pH 8, 6-10 rbc, neg leuk est, neg
nitrite, 0 wbc, 1 epi, bact +, no cultureHbA1C: 4.6Glucose: 89RX: Antibiotic for “UTI”
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Visit to UW Health 9/18/02
• CC: f/u UTI and PMS, wants progesterone cream
UA: pH 7.5, neg leu est, neg nitrite, 0-1 wbc, 11-20 rbc, bact +. >5 epi, no culture
Total testosterone 2 (4-70), free testosterone 0.2 (0.6-6.8)
Rx: Macrobid (different abx from 8/02)
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1st Visit with Me 10/10/02
• CC: 1 1/2 mth h/o urinary frequency without dysuria, abd/R flank pain, now having had “spell” 3 days prior :– 4-blanket-chills, rigors, flu-like symptoms– Fever to 102– Anorexia, vomited once, polydipsia
Exam: P72, BP 112/78 mid-epigastric tender, rest WNL
DDx? Next step?
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10/10/02 Results
RX: Levofloxacin
UA:pH 7, neg leu est, neg nitrite, 6-10 rbc, 0-1 wbc, 1 epi, bact+, culture neg
Blood culture: neg
CBC: wbc 5.6, Hb 12.5, Hct 35, MCV 92
Cr: 0.8
RX: D/C levofloxacin
Ddx? What next?
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10/14/02-12/02
• Phone update (10/14): Pt feeling much better• Cancelled CT scan, changed to IVP for work up of
hematuria ( in part per patient preference -didn’t think she really needed it- felt she was just overreacting to symptoms)
• IVP (10/17): normal• UA: pH 7.5, leu est neg, nitrite neg, 11-20 rbc, 2-5 wbc,
5 epi, bact+• Cytoscopy/Wash cytology/ 12/02 Urology wrap-up:
normalDx:?menstrual blood contaminant, f/u 3 mths
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12/05/02 Clinic Visit with Me
• CC: 3 nights ago: recurrent fevers, 3-4 blanket-chills, rigors, temp to 100F, shaking, diaphoresis with feeling hot after she broke a sweat, full body aches, HA the next day. 2 nights ago: same sx, temp to 102. One night ago: fine. Yesterday: chiropractor found cervical lymph nodes on exam. Stress, brother died 3 weeks ago.
• Exam: NAD, P 60, BP 110/70, few small cervical nodes, 5 small lymph nodes R groin, non-impressive.
• Ddx?? What next??
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Selected 12/05/02 Results
• CBC: wbc 5.6, Hb 12.5, HCT 35• ESR 16• NA 145, K 2.0, Cl 96, CO2 34, BUN 12, Cr
0.8, glucose 84• T prot 6.5, D bili 0.2, ALKP 52, AST 20,
ALT 33• TSH 1.40• Ddx? What next??
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12/05/02 Further “Results”
• Phone conversation: no eating disorder/excessive exercise, eats red licorice regularly (but NO black licorice- yuck), has used diuretics in the past but denies recent diuretic use, no further spells/episodes, no known h/o HTN ever
• Review: Ddx Hypokalemia/hypernatremia/ metabolic alkalosis
• RX: KCl supplements
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12/02/02 & 12/06/02 Results
• Na 143, K 2.1, Cl 97, CO2 34, BUN 11, Cr 0.6, Mg 2.3
• Serum Osmolality 298• Urine Cl 52, Cr 57.0, Na 38, K 38, OSM 358• Aldosterone 61.1 ng/dl (supine 1-16, upright 4-31)• Renin activity 2.3 (upper limit of normal)• CT Abd/pelvis: 1.4x2.4 cm R adrenal mass with
>50% washout on delayed images c/w adenoma, bilateral ovarian cysts
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12/13/02 “Curbside” Endocrine Consult
• Dr. Shenker confirms findings consistent with aldosteronoma
• D/C KCl supplement• Start spironolactone 50 mg po tid• Q 3week electrolytes faxed from home in Florida• Refer to Dr. Chen for laparoscopic adrenalectomy
after 6 weeks of spironolactone• Formal endocrine consult 1/28/03
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Follow-Up
• Laparoscopic adrenalectomy 2/05/03 complicated by 1 day post-op ileus, otherwise successful
• Pt presents for intermittent clinic visits with nonspecific somatic symptoms (including dysuria-with normal UA) and psychosocial issues but has normal labs and no more spells/episodes
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Objectives
• Review the differential diagnosis of hypokalemia• Review hyperaldosteronism and aldosteronoma
(Conn’s syndrome) presentation and diagnosis; aldosteronoma treatment
• Reminder to take care in interpreting urinalyses/use of follow- up cultures
*I have no financial disclosures to report*
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DDx:Unexplained Metabolic Alkalosis and HypoK+ & Nl BP
• Diuretics, vomiting, or Bartter’s• Examine pt for signs of self-induced vomiting• Urine Cl- <25 in this setting reflects vomiting or
diuretic therapy• High urine chloride reflects concurrent diuretic
use or Bartter’s--check urine assay for diuretics to distinguish
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?? Bartter’s Syndrome
• No hypertension • Hypokalemia due to renal K+ wasting• Weakness, periodic paralysis, polyuria due to
hypoK+• Autosomal recessive, often presents in childhood• Elevated plasma renin activity and aldosterone,
hypomagnesemia
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Ddx: Hyperaldosteronism: Other Secondary Causes
• Licorice
• Renin-secreting renal tumor
• Renal disease
• Non-aldosterone mineralocorticoid excess
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Ddx: Primary Hyperaldosteronism
• Aldosteronoma (Conn’s Syndrome) (60%)• Idiopathic with bilateral micronodular
hyperplasia (40%)• Glucocorticoid-remediable
hyperaldosteronism with bilateral adrenal hyperplasia (rare, familial)
• Aldosterone secreting adrenal carcinoma (rare)
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Evaluation of Suspected Primary HyperAldosteronism
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Clinical Characteristics of Aldosteronoma
• Hypertension-almost universal– Case report from 1999 reported 2 cases and referred to
only 10 known and previously documented cases
• BP often very high (160-180’s/105-110’s), but malignant HTN is rare
• Females>males• Middle aged, occasionally young persons
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Clinical characteristics, continued
• Hypokalemia symptoms (muscle weakness, fatigue, cramping, muscle paralysis, polyuria, polydipsia)
• Lack of lower extremity edema
• Blunted circulatory response (postural hypotension, bradycardia)
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Lab Findings
• Hypokalemia (more severe than in adrenal hyperplasia)
• Mild hypernatremia
• Mild hypomagnesemia is possible
• Mild metabolic alkalosis
• EKG: prolonged QT, U waves (hypoK+)
• Very low plasma renin activity (PRA)
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Diagnostic Findings in Primary Hyperaldosteronism/ Ald’oma
• Ratio of Plasma Aldosterone Concentration (PAC in ng/ml) to PRA (in ng/ml/hr) is typically 30-50 (vs 4-10 in essential HTN)
• PAC> 20 ng/dl plus PAC/PRA>30 has sens and spec 90% for aldosteronoma
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Definitive Biochemical Dx of Primary Hyperaldosteronism
• Confirmation test used in patients with HTN with positive PRA/PAC screening test
• 3 day high sodium diet load/IV saline infusion followed by 24 HR urine collection for aldosterone, K, Na; serum aldosterone measurement:– When Urine NA> 200 mEq, aldosterone>14 ug/24hrs
(39 nmol/d), PAC doesn’t fall below 6 ng/dl (often>10)--then primary hyperaldo is present
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Is it Adenoma or Hyperplasia?
• ? Is positive PRA/PAC plus nonsuppression with saline, plus unilateral adenoma enough to distinguish aldosteronoma from hyperplasia?– Probably in patients less than age 40-50 with
characteristic findings.– PAC/PRA >32 100% sens, 61 spec for
adenoma in one study/ PAC>20 +PAC/PRA>30, 90% sens and spec
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Adenoma vs. hyperplasia
• Postural test: aldosterone level decreases or stays the same in aldosteronoma
• Increased levels of aldosterone precursors in aldosteronoma (18-OH- corticosterone & 18-oxocortisol)
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Further Tests
• If no adrenal mass found:– DEXA suppression test for GRA – 131-I-iodocholesterol radionuclide scintigraphy (incr
unilateral uptake with aldosteronoma)
– Adrenal vein sampling (absence of mass does not exclude adenoma (<1cm may not be detected on CT))
• If adrenal mass found but patient over 40 or 50– Adrenal vein sampling– 131-I-iodocholesterol scintigraphy
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Treatment of Aldosteronoma
• Laparoscopic adrenalectomy
• Non-surgical candidates:– Spironolactone– Dietary sodium restriction (<100mEq/day)– Amiloride if spironlactone intolerant
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References
• Biglieiri, E. Spectrum of mineralcorticoid hypertension. Hypertension 1991;17:251-261.• Blumenfeld, J. Diagnosis and Treatment of Primary Hyperaldosteronism. Ann Intern
Med 1994;121:877-885.• Bravo, E et al. The changing clinical spectrum of primary aldosteronism. Am J Med
1983;74:641-651.• Frasert R et al. Conn’s syndrome: no longer a needle in a haystack. Clinical
Endocrinology 1998; 49:709-710.• Ganguly, A. Primary aldosteronism. NEJM 1998;339:1828-1833.• George et al. The Syndrome of Primary Aldosteronism. • Shenker, Yoram. Medical Treatment of Low-Renin Aldosteronism. Endo and Metab
Clinics of North America 1989;18:414-442.• Vantyghem, M et al. Aldosterone-producing adenoma without hypertension: a report of
two cases. European J of Endocrinology 1999;141:279-285.• Young, W et al. Primary aldosteronism: diagnosis and treatment. Mayo Clin Proc
1990;65:96-110.
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References, continued
Online:
• Up to Date: ”Approach to the patient with HTN and hypokalemia,” “Urine Electrolytes in diagnosis of metabolic alkalosis,” “Glucocorticoid-remediable aldosteronism,” “Licorice and the syndrome of apparent mineralocorticoid excess, “Unexplained metabolic alkalosis and hypokalemia: Vomiting; diuretics;Gitelman’s or Barrter’s syndrome
Books:
• Harrison’s Principles of Internal Medicine: “Hypokalemia,” “Aldosteronism”
• Manual of Endocrinology and Metabolism, Lavin Ed.