DOI: 10.36347/sjmcr.2019.v07i04.008

Pages: 292-295

A 56-year-old man presented with medial rectus muscle injury after endoscopic sinus surgery. His left eye showed marked exotropia and adduction movement was restricted completely. Orbital magnetic resonance imaging revealed a defect in the medial wall of the left orbit and the medial rectus (MR) muscle was not detected clearly. We performed surgery for muscle transposition procedure with resection of the MR muscle under general anesthesia. Postoperatively, exodeviation was improved. Extraocular muscles may be traumatized during endoscopic sinus surgery. Treatment strategies are dependent on accurate interpretation of clinical examination and radiological findings. Surgical strategy may have to be judged during the operation.