<prompt> A 30 years old male complains of loss of erection; he has low testosterone and high prolactin level in blood; what is the likely diagnosis:-Pituitary adenomaTesticular failureCraniopharyngiomaCushings syndrome  <response>: Most common cause of hypersecreting pituitary is Pituitary adenoma. PITUITARY ADENOMA Pituitary adenomas arise primarily from anterior pituitary glandQ Classified as either functional secreting or nonfunctional non-secreting tumors MC functional tumor is prolactinomaQ, which causes amenorrhea galactorrhea in womenQ. MRI is IOC for pituitary tumorsQ 