Frontotemporal Dermal Sinus Tract with 2 Connected Intradiploic Dermoid Cysts: A Rare Case and Review of the Literature.

Abstract

Frontotemporal dermal sinus tracts with associated dermoid cysts are very rare, with only 1 found in the largest series to date and 10 total documented case reports. We present the first case to our knowledge of a dermal sinus tract associated with 2 intradiploic dermoid cysts in the rare location of the pterion and sphenosquamosal suture. The patient was a 15-month-old girl presenting with periorbital cellulitis who was found to have 2 connected intradiploic cysts on radiographic imaging. The mass was excised, and pathology was consistent with a ruptured dermoid cyst. We review of the literature and argue for early identification and prophylactic surgical resection to avoid complications associated with infection and to mitigate risk of subtotal resection.