[Case of multiple thin-walled cavitary pulmonary metastasis from bladder cancer]

A 71-year-old man was admitted to the urological section of our hospital because of hematuria. Cystoscopy revealed a bladder tumor. Transurethral resection of the bladder tumor (TUR-Bt) was performed. This tumor was diagnosed pathologically as bladder cancer (transitional cell carcinoma pT2). His chest computed tomogram showed multiple thin-walled cavitary nodules in both lungs. The pathological images of the specimen that was resected by video assisted thoracic surgery (VATS) showed transitional cell carcinoma. A diagnosis of pulmonary metastasis from bladder cancer was made. This is a rare case.