[Hypertrophy of the masseter muscle. Clinical aspects--etiology--therapy]

Masseteric muscle hypertrophy is a problem occurring in daily practice. Main complaints are isolated swelling of the masseteric muscle, myalgia, and functional disturbances of the parotid gland. Diagnosis is effected by inspection, palpation and anterior posterior radiograph. Sialography, CT, EMG are rarely used. Main points in the discussion of the aetiology are congenital genesis, the psychological factor, habits and occlusal disorders. The therapy consists of surgical reduction of the hypertrophied muscle as well as of conservative methods.