Clinicopathological study on craniopharyngioma with sebaceous differentiation.

We presented 2 cases of craniopharyngioma, which showed sebaceous differentiation. Both cases shared the following features: 1) neuroradiological detection of a cystic tumor accompanied by calcification, 2) clear yellowish fluid detected in the cyst during surgery, 3) histological rating as an adamantinomatous type, 4) the presence of a nest-like distribution of multivacuolated cells in the innermost layer of the cyst.