Coronoidectomy for a case of severe trismus due to cicatrical changes in the left temporal region after treatment for liposarcoma

Abstract

We report a case of severe trismus due to cicatrical changes in the left temporal region after treatment for liposarcoma. A 51-year-old woman was referred to our hospital because of severe trismus. Mouth opening range was only 8 mm.
Computed tomography and magnetic resonance imaging showed no findings of temporomandibular ankylosis. Decreased signal intensity around the left coronoid process was seen on magnetic resonance images. A diagnosis of severe trismus due to cicatrical changes around the left coronoid process was strongly suggested, and coronoidectomy was performed. At operation, the mouth could be opened up to 45mm. A mouth opening range of 40mm has been maintained by the mouth opening training after operation.