Frontonasal osteotomy to facilitate removal of an intracranial nasal dermoid.

Dermoid sinus is the most common midline nasal anomaly. Intracranial extension has been reported in up to 45% of cases and requires a combined intracranial-extracranial besection. We present a technique of en-bloc ostectomy of the central bandeau and nasal bones to approach this malformation. This allows unobstructed visualization of the entire cyst and sinus tract, including portions that traverse or lie under the nasal bones, and ensures complete excision. Additionally unnecessary disruption of the nasal bones and facial scarring are avoided.