I've been told I have a pituitary adenoma. Is it dangerous?

A pituitary adenoma is a benign (non-cancerous) tumour of the pituitary gland, which sits at the base of the brain and acts as the 'master gland' controlling most of your hormone systems. They are estimated to be present in roughly 1 in 10 people and are often discovered incidentally on brain imaging done for other reasons. The main concerns are: whether the tumour is secreting excess hormones (causing conditions like acromegaly, Cushing's disease or elevated prolactin) and whether its size is pressing on surrounding structures, particularly the optic nerves. Small non-secreting adenomas often require only monitoring with periodic MRI and hormone checks. Those causing hormone excess or visual changes may require medication or surgery, with excellent outcomes.