Abstract
Parasellar epidermoid and dermoid tumors are rare tumors in the whole intracranial tumors. Most of the tumors occur in the posterior fossa, especially as a C-P angle tumor. Those tumors are also seen in parasellar region. Clinical and imaging features of parasellar epidermoid and dermoid tumors are different from in the posterior fossa. Most of epidermoid tumors in the parasellar region are associated with peritumoral cyst, dermoid cyst. On the other hands, dermoid tumor in the parasellar region is mostly solid without peritumoral cyst. MRI shows wide-spreading cisternal fatty deposits in the sulci, especially in the interhemispheric fissure, due to spontaneous rupture of the tumors, which are characteristic findings to diagnose that those tumors are epidermoid or dermoid tumors. Comparing with the capsule of dermoid tumor, that of epidermoid tumor is very thin, resulting in difficult total removal of the capsule. Once the tumor capsule is remained, the tumor is possible to recur, and careful follow-up using MRI is necessary.
