Dystrophic calcification is an ectopic calcification with fibrous connective tissue, without general mineral disorders, and is rarely found in the oral and maxillofacial region. We report a case of dystrophic calcification in the masseter muscle. A 57-year-old woman visited our department with the chief complaint of right cheek swelling. CT revealed two calcification lesions in the right masseter muscle. One lesion was intraorally excised under general anesthesia. Layered collagen fiber with calcification nodules was observed histopathologically, and there were no disorders in her blood and breast X-ray examinations, therefore a diagnosis of dystrophic calcification was made. Six months has passed since the operation and no evidence of recurrence or growth of the residual lesion was observed.
