Oral commissure reconstruction with split masseter muscle transposition and cheek skin flap.

Satisfactory reconstruction of the cheek involving the oral commissure is always challenging. A 64-year-old male patient underwent full-thickness repair of a cheek defect involving the oral commissure following excision of squamous cell carcinoma. Reconstruction was performed with a cheek skin flap combined with split masseter muscle transposition. This method was found to be useful for reconstructing the oral commissure with good functional and aesthetic results.