<unk> s are tumors that occur in the pituitary gland.<unk> s are generally divided into three categories dependent upon their biological functioning: benign adenoma, invasive adenoma, and carcinomas. Most adenomas are benign, approximately 35% are invasive and just 0.1% to 0.2% are carcinomas.<unk> s represent from 10% to 25% of all intracranial neoplasms and the estimated prevalence rate in the general population is approximately 17%. Non-invasive and non-secreting<unk> s are considered to be benign in the literal as well as the clinical sense; however a recent meta-analysis (Fernández-Balsells, et al. 2011) of available research has shown there are to date scant studies – of poor quality – to either support or refute this assumption. Adenomas exceeding in size are defined as macroadenomas, with those smaller than referred to as microadenomas. Most<unk> s are microadenomas and have an estimated prevalence of 16.7% (14.4% in autopsy studies and 22.5% in radiologic studies). A majority of pituitary microadenomas often remain undiagnosed, and those that are diagnosed are often found as an incidental finding and are referred to as incidentalomas. Pituitary macroadenomas are the most common cause of hypopituitarism. While<unk> s are common, affecting approximately one in 6 of the general population, clinically active<unk> s that require surgical treatment are more rare, affecting approximately one in 1,000 of the general population.
Pituitary adenoma
Adrenocortical adenoma
Metanephric adenoma
Thyroid adenoma
Parathyroid adenoma
Hürthle cell adenoma
Nephrogenic adenoma
Pituitary disease