dermoid / epidermoid tumor

"intracranial pearly tumor"

congenital ectodermal tumor
stratified squamous capsule secretes cholestrine + desquamated cells
site:
- petrous apex / CPA (most common)
- suprasellar cistern (parasellar mass)
- cerebral hemisphere
- cerebellum / 4th ventricle
CT:
- low density (d/t fat content); occ. high density
- no enhancement
- extra-axial

Charles E. Kahn, Jr., MD - 2 February 1995
Last updated: 1 October 2013