Necrotizing myositis – Case report

摘要

Clinical and histological photographs and computed tomography (CT) images of our case of necrotizing myositis. (A) Initial preoperative clinical photograph of the left face with a diffuse swelling but normal skin color. (B) Axial CT image showing soft tissue swelling with air bubbles over the left submasseteric, submandibular, and pterygomandibular spaces and airway deviation to the right side. (C) Coronal CT image exhibiting infection over parapharyngeal space, temporalis muscle, and masseter muscle. (D) Axial CT image revealing large air bubbles in the buccal and parapharyngeal spaces. (E) Liquefaction of masseter muscle and medial pterygoid muscle was found in the extensive surgical debridement. (F, G and H) Histological examination of the tissue specimens showed necrotic debris, granulation tissues, and a severe mixed neutrophil and lymphoplasma cell infiltrate in the necrotic and edematous muscle tissues (hematoxylin and eosin stain; original magnification; F, 10×; G, 40×; H, 40×).