|S||Suprasellar adenoma||aka pituitary adenoma; enhances on MR|
|T||Teratoma / Seminoma|
|C||Craniopharyngioma||Arise from Rathke's cleft; papillary form, age 40s; typically calcified and cystic|
|H||Histiocytosis / Hypothalamic glioma|
|M||Meningioma / Metastases||Most common pituitary mets: breast, lung|
|E||Eosinophilic granuloma / Epidermoid|
MR characteristics as well as age can be used to narrow the differential, but those features are beyond the scope of this post... which is a fancy way of saying I am too lazy to look all them up right now, but hopefully will update this at a later time. Or just check out the references below.