Intracranial dermoid cysts with nasal dermal sinuses.

Dermal sinuses penetrating the dura are important in that they may be complicated by C.N.S. infection, and this complication can be prevented by early surgery. Although well recognised over the occiput and lumbar spine, nasal dermal sinuses extending intracranially are much rarer and have received little attention in the neurosurgical literature. Two unique cases are presented, together with a literature review, discussing the anatomy, radiology, and management of the condition.