A case of congenital orbital cyst originating from the common sheath of superior rectus and levator palpebrae superioris muscles

Purpose: To assess the clinical and histopathological features of a case of congenital orbital cyst originating from the common sheath of the superior rectus and levator palpebrae superior muscles. Methods: Preoperative, peroperative and postoperative characteristics of th e described clinical condition in a 37-year-old woman is documented. Results: The cyst was found to be related with the common sheath of the sup erior rectus and levator muscles during the surgical intervention and histo pathological examination revealed a cystic structure with a lining resembli ng that of conjunctiva. Conclusion: Our findings support the proposal by Rose Bi O'Donnell who firs t reported four cases in 1995 suggesting a new group of congenital orbital cysts distinct from dermoid, epidermoid or conjunctival cysts.