Dermoid Cyst of Conjunctival Origin Attached to the Tarsus in a Pediatric Patient.

Dermoid cysts of cutaneous origin are common orbital lesions, whereas dermoid cysts of conjunctival origin are rare. The authors present a case of a dermoid cyst of conjunctival origin that was attached to the tarsus in a pediatric patient. A 2-year-old boy presented to the clinic with an approximately 2 cm in diameter mobile nodule in the upper eyelid on the temporal side that distorted the eyelid architecture with temporal ptosis. During surgical excision, the lesion was firmly adherent to the tarsal plate. The mass was a conjunctival dermoid cyst lined by nonkeratinizing squamous epithelium with goblet cells and hair follicles on histological examination. This case represents the first report of a conjunctival dermoid cyst attached to the tarsus.