22. Benign tumor from ( Rathke's cleft – source of adenohypophysis). -Suprasellar expansion. -Often cystic, similar structure as adamantinoma of the jaws. Craniopharyng i oma
23. Gross picture: Large capsulated solid or cystic mass. Areas of calcification. Microscopic picture: Masses of squamoid and columnar epithelium lining cystic spaces filled with oily fluid in a loose fibrous stroma. Craniopharyng i oma.