Masticatory muscle tendon-aponeurosis hyperplasia that was initially misdiagnosed for polymyositis: a case report and review of the literature oleh Wataru Katagiri, Daisuke Saito, Satoshi Maruyama, Makiko Ike, Hideyoshi Nisiyama, Takafumi Hayashi, Jun-ichi Tanuma, Tadaharu Kobayashi