How prevalent are pituitary tumors/diseases?

1 in 5: Almost 20% may have pituitary tumors but most will remain undetected as they do not cause any symptoms. Those that grow large enough to cause symptoms due to size or secrete enough of one of many hormones that the pituitary normally secretes may need to be treated with medicines or surgery. Prognosis is generally good. Visit: http://www.Ncbi.Nlm.Nih.Gov/pubmedhealth/pmh0001723/.

Not uncommon: Pituitary adenomas can display an array of hormonal and proliferative activity. Once primarily classified according to size (microadenomas, < 1 cm; macroadenomas, > or = 1 cm), these tumors are can also be further classified according to functional status. The current overall estimated prevalence of pituitary adenomas is around 16.7% with the majority of them being of benign nature.