I am a healthly 41 year old male. My primary care doctor believes in checking hormone levels as a matter of routine. That is, she checked my hormone levels merely as a part of my annual pyshical. All serum levels in my basic chemistry panel, CBC plus differential, thyroid panel, and urine analysis were normal except my estradiol. It was 84 with a lab range with an upper limit of 54. My testosterone was normal at 630 and my DHEA was normal at 265. I am thin and I have no masses on the testicles that can be felt. But, i am nervous about the elevated estradiol. My doctor seems not alarmed and will be repeating the test.
What would be the most common cause of this elevated estriadol given my age, normal weight, no testicular mass, and aforementioned lab values? How likely is an adrenal tumor? Malignancy?