Cervical thymic cyst in childhood: a case report.

Cervical thymic cysts are rare cervical masses which usually present in the first decade of life accounting for 0.3% - 1% of all congenital neck masses. Due to its rarity thymic cysts are seldom included in the differential diagnosis of cystic cervical mass and are often mistaken for more common conditions such as branchial cleft cyst or cystic hygroma. Herein we present a case of a 6-year-old girl with a right lateral cervical cystic mass with multiple septae extended from mandibular angle along the neurovascular bundle of the neck which revealed to be a thymic cyst at histopathology.