ii) 33) Epidermoid

Epidermoids can rutpure causing chemical meningitis.

This can lead to vasospasm which can lead to devastating infarcts

Case in Point

4.9.13 "White Epidermoid"

http://3s.acr.org/CIP/CaseView.aspx?CaseId=yAIg7PFcQTQ=

Reference:

Extradural dermoid tumor of the petrous apex. Case report.