外伤性骨化性肌炎系一种罕见的疾病。外伤后在肌肉和其他邻近骨骼的软组织中有骨质形成,病灶含活跃增殖的成纤维细胞和成骨细胞,在早期可误诊为恶性肿瘤。发生于头颈部的骨化性肌炎极为罕见,作者报告一例发生于颈淋巴结清扫术之后的颈阔肌骨化性肌炎。患者男性,78岁,患右后外侧咽壁和下咽壁鳞癌,经~(60)钴照射,总剂量为6,735R,治疗结束时无残留肿癌。5个月后右颈侧淋巴结肿大,原发灶无复发,继之进行颈淋巴结清扫术,证实为 Traumatic myositis ossificans is a rare disease. After trauma, bone formation occurs in the soft tissues of muscles and other adjacent bones. The lesions contain actively proliferating fibroblasts and osteoblasts, which can be misdiagnosed as malignant tumors in the early stage. Osseous myositis, which occurs in the head and neck, is extremely rare. The authors report a case of ossification myotitis following cervical lymph node dissection. The patient was a 78-year-old man with squamous cell carcinoma of the right posterolateral pharyngeal wall and hypopharyngeal wall. The total dose was 6,735R after exposure to cobalt (60) cobalt. No residual tumor was present at the end of treatment. After 5 months, there was enlargement of the right cervical lymph node, no recurrence of the primary tumor, followed by cervical lymph node dissection, confirmed as