喉頭微細手術で高度開口障害を呈した咀嚼筋腱・腱膜過形成症例

抄録

We experienced a case in which laryngeal deployment was difficult due to an unexpected opening disorder during laryngeal microsurgery for laryngeal tumors. The patient was a 39-year-old man, and the jaws were preoperatively examined. After intravenous anesthesia with no history of arthropathy and no dental damage, opening obstruction was noted, but we were still able to perform intubation using a McGRATH^® tube．Although the opening was about 15 mm in size, it was difficult to deploy a laryngeal microscope. The tissue was collected transnasal using a biopsy and nasal fiberscope with forceps. After the removal of the intubation tube, the opening improved to 25 mm. Characteristic square mandible face was noted, and the cause of the opening disorder was thought to be masticatory muscle tendon aponeurosis hyperplasia. We herein report this case，including some considerations from the literatures.