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NBME 23 Answers

nbme23/Block 3/Question#16

A 40-year-old woman comes to the physician because ...

Pituitary gland

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Dexamethosone suppresses ACTH = Pituitary Adenoma Dexamethosone fails to suppress ACTH = Ectopic ATCH (ex - Small Cell Lung Cancer)

sympathetikey  *ACTH +  
meningitis  If im not mistaken, Dexamethosone also fails to suppress ACTH = Adrenal Gland Adenoma +1  
therealloureed  I think an adrenal gland tumor would have low/undetectable ACTH? aka no dex suppression +2  
bigjimbo  Low ACTH = adrenal adenoma High ACTH, suppressible = Pituatary adenoma High ACTH, non-suppressible = SCLC +1