I have been asked that umpteen times by folks who care about me. Other folks just look at me like I'm from a foreign country, and even others just nod and go on like they already know. I'm sure they go right home and google it. Ok, maybe some of them do. When you get right down to it, I've become a walking library of sorts with facts and figures most medical students and doctors don't know. It's a matter of self-preservation, but you already know that if you are fighting any illness.

So, what is Cushing's? There are two terms used with Cushing's: Disease and Syndrome. They signify the source of the illness, although the presentation is pretty much the same with both. Cushing's Disease is hypercortisolism due to a pituitary source of stimulation. Cushing's Syndrome is hypercortisolism due to an ectopic or adrenal source. There really is a third type of Cushing's called iatrogenic Cushing's which results from the overuse of corticosteriod medications. And actually another type called pseudo-Cushing's. I want to discuss Cushing's Disease/Syndrome (CD/CS).

CD/CS is an endocrine disorder caused by chronic exposure of the body's tissues to excess levels of cortisol - a hormone naturally produced by the adrenal gland. Pituitary adenomas, usually benign, secrete increased amounts of ACTH (adrenocorticotropic hormone), a substance that controls the release of cortisol in that feedback loop I mentioned the other day. It typically causes an overproduction of cortisol. Tumors of the adrenal gland and ectopic ACTH producing tumors can cause similar problems with cortisol overproduction.