因恶性肿瘤成为肌病的重要诱发因素,多发性肌炎合并恶性肿瘤在临床并非鲜见,但由于肿瘤起病较为隐匿,故恶性肿瘤相对肌病临床症状出现较晚。我科于今年4月收治一例初诊为“急性多发性肌炎”患者,经积极治疗,病情未改善,并有继续加重趋势。后经进一步完善检查,最终确诊“晚期肺 Due to malignant tumors become an important predisposing factor in myopathy, polymyositis with malignant tumor is not uncommon in clinical, but due to the occult onset of the tumor, so the relative symptoms of malignant tumors appear later clinical symptoms. In April this year, our department admitted a newly diagnosed patient with “acute polymyositis”. After active treatment, his condition did not improve and the trend continued to increase. After further improvement of the inspection, the final diagnosis of "advanced lung