Fig. 4From: Masticatory muscle tendon-aponeurosis hyperplasia that was initially misdiagnosed for polymyositis: a case report and review of the literaturePreoperative magnetic resonance imaging (MRI). A Axial view of T1-weighted image (T1WI). Arrows show bilateral enlarged masseter muscle aponeurosis. Dotted arrows show high intensity areas in the masseter muscle. B Frontal views of T2-weighted images (T2WI). There is no evidence of inflammatory legions within the masticatory musclesBack to article page