I was waiting until my most recent endocrinology appointment to do an update, but since the office just called and put off the appointment until Friday (lab work not back yet), I'll give the short version here.
The summary of what we have thus far:
MRI showing a 2mm adenoma, low and central in the anterior lobe of the pituitary.
Blood workup #1: Normal GH, borderline cortisol, high TSH (thyroid stimulating hormone)
Blood workup #2: Normal GH, Normal IGF-1, high cortisol, borderline TSH, low thyroid
Blood workup #3 (with cortisol suppresion): Cortisol not suppressed.
Because the suppression test didn't suppress my cortisol levels, we did the more formal test for Cushing's (24-hour urinalysis, whee!), and yet another more generalized blood panel. That's what the lab is slow getting back with. I should get those results on Friday morning when I go in.
Given the low thyroid and high cortisol, I'm suddenly not feeling as guilty about the 40 lbs. I've put on in the last decade. With both of those going on, weight gain is pretty much inevitable. It also explains the great exercise mystery of three years ago - to wit: how could I train for a triathlon for six months and lose a total of three pounds?