Husband has super elevated hormones in brain

Erial
We have been ttc for over a year. My dh has done 2 analysis that came back at 0 sperm. He was finally able to see the urologist and did blood testing. It came back at super high levels of a hormone in his brain. Idk what it was because they didn't say. They said it could be a cyst on his brain causing this. He has to go back in for more blood work and a MRI. 
Has anyone heard about this or gone through it?