Bilateral extraocular muscle epithelial inclusion cysts as a complication of strabismus surgery

This is a case report of bilateral extraocular muscle epithelial inclusion cysts found in the body of the muscle, not just involving the tendon or the new tendon-scleral interface, after strabismus surgery in a 3-year-old boy with consecutive exotropia. Histologic review of the cysts confirmed the presence of inclusion cysts originating from proliferating conjunctival epithelium occurring in the body of both medial rectus muscles. We postulated that the occurrence of bilateral inclusion cysts might have caused the persistent postoperative localized inflammatory response.