Cystic lesions of the pituitary: clinicopathological features distinguishing craniopharyngioma, Rathke's cleft cyst, and arachnoid cyst. - Shin,J.L.; Asa,S.L.; Woodhouse,L.J.; Smyth,H.S.; Ezzat,S. (J Clin Endocrinol Metab, 1999)