Please see brain/pituitary forum for my response.
How do they test for the adrenals? I will post all the different test they just recently done on bloodwork that we are awaiting results on. My diahrea issue is helped with Questran (Cholestyramine) and they have me on Trilipix for my Tryglycerides. I had terrible stomach cramps and had a colonoscopy that only revealed a spastic colon. After that (sometime around 04 or 05) my hormones were off on a routine blood test. The doc suspected it was my gall bladder or thyroid and had both tested and the gall bladder worked 1%. So I had it removed. The thyroid uptake scan revelaed normal which was odd because I believe I already had my goiter then. Anyway..still have the pain and diahrea so I still take the questran. With the questran, it is only occoasional pain/cramping. But I must take it everyday or otherwise I get sick as a dog and have to sit on the toilet all day. (sorry so graphic)
The internal medicine doctor had me get the pituitary MRI where they first discovered my own pituitary tumor. When she wanted to order it- I said I'd just had a scan of my brain very recently (I believe it listed my pituitary as normal) and wouldn't it have picked it up? She explained that it is a special kind of MRI that looks at the pituitary and that it is done differently. I got the pituitary MRI and they found a microadenoma that was about 6 mm. You really should get tested for both pituitary issues and adrenal as Rumpled is saying.
The pituitary has influence on your thyroid, your adrenals, and can affect your menses as well. Also, with your high blood pressure, heart palpitations & migraines, be sure and get tested not only for Cushing's, but also for an adrenal tumor called pheochromoctyoma... it's rare, but worth testing for. From my research online, the most sensitive test for this type of tumor (which can elevate your blood pressure, cause rapid heart rate and sweating and I believe, headache as well) is a fasting blood test called plasma free metanephrines. (It's even more sensitive than urine testing for detecting pheochromocytoma tumors.) You will want to avoid tylenol at least 48 hours to being tested as it can interfere with assaying your levels of these inactive metabolites of epinephrine (adrenalin) and norepinephrine (noradrenaline).
It can miss it if the MRI was not done properly, or the radiologist can miss seeing them (they are typically tiny), it can fall between the 3mm slices of the MRI... many reasons...
Or your source can be adrenal. You need testing.
About 3 years ago, my ENT ordered a MRI of my brain to try to figure out where my headaches are coming from. He didn't see anything and said it must just be allergies or migraines. Would that MRI have showed up if I had a Pituatary problem/tumor?
And hopefully you mentioned the migraines as well, as if a pituitary tumor is large enough (if you have one), it can cause headaches as well.
I'd also bring up the thirst and nocturia to the endo too.
I think you should be asking for a dynamic MRI of your pituitary gland, if your endo has not yet ordered it. Be sure and mention not only the thyroid issue but the mense issue to him/her. And come take a look at the brain/pituitary tumor forum, where rumpled is the moderator. It could be very enlightening for you! And she can tell you how to get tested properly for Cushing's too, as it can be missed sometimes!
I am also thirsty all the time but my blood sugar is normal. I also get up to urinate in the middle of the night.