Adrenal 1 Test
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| A. APA (Conn dz, 65%). Bilateral hyperplasia of zona glomerulosa (35%). Primary adrenal hyperplasia. Adrenal carcinomaB. High aldosterone -> Na reabsorption -> volume expansion, HTN -> low K (2/2 ion exchange) -> AGMAC. ACTH produced by SCLC & other carcinoids. ADH from SCLC, rarely prostate / cervical. PTH-related protein from squamous cell lung ca D. low levels of corticotropin-releasing factorE. Salt-wasting form; Virilizing Syndromes F. Hold aldactone, CCB, ACEI. At least 150mEq of Na intake daily (to suppress aldosterone production) G. surgical (effective only in patients with unilateral disease). Angioplasty if RAS. H. 250 mcg Cosyntropin; measure cortisol before & 30 & 60 min after injxn; pre or post >18: R/O AII. Late-onset: women = hirsutism & menstrual irreg which can mimic PCOS; Men/boy: androgen excess can be asymptomatic J. considering the abruptness of disease onset
K. Stop any offending meds; Med tx options; Interventional tx options (Postmeno F can undergo lap bilat oophorectomy, if scans are nml; small hilar cell tumors of ovary may not be visible on scansL. 10% of dz are: extra-adrenal; bilateral; familial; malignant; not assoc w/ HTNM. >18: r/o AI; <3: R/I AI; btw this range: need dynamic testingN. Measure PTH & Ca levels. Image pancreas & pituitaryO. Transphenoidal microsurgical removal (if proven Cushing dz)P. Alpha adrenergic-blockade, then beta-blockade PRN. NEVER beta before alpha (may worsen HTN crises). CCB may be better tolerated than alpha-blockade.Q. Tx HYPOTENSION w/ volume (2 to 3 L of NS or D5NS); Give IV DEXAMETHASONE 4mg or IV HYDROCORTISONE 100mg TID (Dex preferred bc it won’t interfere w/ further dx testing & is long acting) R. 24h urine free cortisol. CRH-Stimulation test. LD & HD dex suppression. Petrosal sinus sampling. Octreotide scintigraphy to localize ectopic source. MRI S. Pheochromocytoma T. cancer (paraneoplastic syndrome) |
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Abarnard
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