Surgical ciliated cysts or post-operative maxillary cysts are benign cystic lesions usually induced after a surgical procedure in the maxillofacial area. It is a cystic lesion that develops, following a radical sinus surgery to treat maxillary sinusitis. The cyst progressively enlarges due to the osmotic diff erence causing destruction of the adjacent bone and structures. The clinical scenario may be identical to a radicular cyst if a nonvital tooth is involved. This is a case report of a healthy 17-year-old adolescent with the complaint of swelling in the right side of the face for the past 2 years.