某中年男性因多个关节肿痛,四肢末端关节尤甚,被疑及类风湿关节炎,但多次检查类风湿因子均为阴性,没有清晨僵硬现象,用多种非甾体抗炎镇痛剂,甚至局部注射抗炎作用极强的皮质激素,均未能缓解病情。事出偶然,在一次常规胸部X线检查中竟发现肺部有异常阴影,后经多种检查确诊为肺癌。当手术切除肺部肿瘤后,关节肿痛迅速缓解。该患者的骨关节病变系由肺癌引起,医学上将此种现象称为肺癌性骨关节病,这种骨关节病是最常见的一种肺癌性肺外 A middle-aged man had multiple joint swelling and pain, particularly extremities joints, suspected and rheumatoid arthritis, but repeatedly examined rheumatoid factor were negative, there was no morning stiffness, with a variety of non-steroidal anti-inflammatory analgesic Agents, and even local injections of corticosteroids with strong anti-inflammatory effects, failed to alleviate the disease. The accident happened. In a routine chest X-ray examination, abnormal shadows in the lungs were found. After a variety of tests, it was diagnosed as lung cancer. After surgical removal of a lung tumor, joint swelling and pain quickly resolved. The patient’s osteoarthrosis is caused by lung cancer. This phenomenon is medically referred to as lung cancer osteoarthropathy. This osteoarthropathy is the most common type of lung cancer outside the lung.