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目的分析首发为肺外表现的原发性肺癌，以提高原发性肺癌的早期诊断。方法回顾性分析37例原发性肺癌的临床资料。结果37例原发性肺癌中首发肺外表现为肥大性肺性骨关节病13例；杵状指（趾）11例；内分泌异常和代谢紊乱9例；癌性肌无力2例；静脉血栓1例；腹泻1例。结论认识肺癌的肺外表现，使首发为肺外表现的原发性肺癌得到早期诊断及治疗。“,” Objective To analyse the primary lung cancer with extrapulmonary manifestation as the first symptom and improve the methods of early diagnosis.Methods A retrospective analysis was made of al clinical data of 37 patients with extrapulmonary manifestation as the first symptom of the primary lung cancer.Results Al 37 cases of primary lung cancer with extrapulmonary manifestation as the first symptom, 13 cases showed hypertrophic osteoarthropathy; 11 cases clubbed fingers; 9 cases endocrine abnormality and metabolic disorder; carcinoma amyosthenia; 1 case phlebothrombosis; 1 case diarrhea.Conclusion Knowing lung cancer with extrapulmonary manifestation as the first symptom can make it to be early diagnosed and treated.