Most pituitary adenomas are benign - but they are usually classified by the hormone they secrete or they are defined as non-secreting. Did you get a copy of the pathology?
I had a couple of pit tumors myself - I am the CL in the pit/brain tumor area... just FYI - keep an eye on the hormones as it is rather unusual post-op pituitary to not be on at least one hormone even just for a while. The pituitary is usually unhappy to be wacked around by the tools. Also, things can change and the lesion may or may not grow back. Is your endo a neuro-endo?
Keep us posted too on the status of the FNA. I also had thyroid issues and quite a few FNAs in my time before my thyroid was removed.
I had a Pituitary Macroadenoma which was benigne as per pathology and I am not taking any hormone replacement... Thanks for the information on potential FNA
Sounds like a FNA is in your future...
What kind of pituitary lesion did you have? Are you taking hormone replacement from that surgery?