Frontotemporal Dermal Sinus Tract with Two Connected Intra Diploic Dermoid Cysts; A Rare Case and Review of the Literature

Background 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. Case Description 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. Conclusions 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.