Condition	Characteristics
Prolactinoma	Most common pituitary adenoma; hypogonadism and galactorrhea
Ectopic growth hormone–secreting tumor	Extrapituitary acromegaly
Somatotroph adenoma	Pituitary acromegaly
Craniopharyngioma	From Rathke’s pouch, with diabetes insipidus, growth hormone deficiency, and gonadal failure
Meningioma	Richly vascularized nonendocrine tumor, from mesoderm cell layer, attached to dura