Table 1 Clinicopathological classification of pituitary adenomas.

Clinically functioning adenomas	Clinically silent adenomas
Adenomas causing GH excess
Somatotroph adenomas	Silent somatotroph adenomas
Mammosomatotroph adenomas
Adenomas causing hyperprolactinaemia
Lactotroph adenomas	Silent lactotroph adenomas
Lactotroph adenomas with GH reactivity
Adenomas causing TSH excess
Thyrotroph adenomas	Silent thyrotroph adenomas
Adenomas causing ACTH excess
Corticotroph adenomas	Silent corticotroph adenomas
Adenomas causing gonadotropin excess
Gonadotroph adenomas	Silent gonadotroph adenomas
Plurihormonal adenomas	Hormone‐negative adenomas

ACTH, adrenocorticotrophic hormone; GH, growth hormone; TSH, thyrotropin.