Table 6.3-1. Characterization of pituitary adenomas

Type of adenoma

Percentage

Nonfunctioning adenomas

55%

Rathke cleft cysts

14%

Prolactinomas

11%

Other pituitary cysts

5%

Somatotropinomas (GH secreting)

5%

Craniopharyngiomas

5%

Corticotropinomas (ACTH secreting)

2%

Meningiomas

2%

Arachnoid cysts

0.5%

Other lesions

0.5%

ACTH, adrenocorticotropic hormone; GH, growth hormone.