Metastatic transitional cell carcinoma from the bladder: radiographic manifestions

Metastases from transitional cell carcinoma of the bladder are not widely appreciated radiographically, although they are commonly found at autopsy. Radiographic evidence of metastatic disease was reviewed in 51 patients. Sites included lung, 28; bone, 24; mediastinum, eight; liver, eight; brain, three; urethra, one; abdominal nodes, one; and extradural space, two. The patterns of lung metastases consisted of solitary nodules, multiple nodules, sigmental infiltrates, pulmonary edema, and a Pancoast tumor. A sarcoidlike pattern with hilar and interstitial disease was also seen. One patient had a malignant pleural effusion. Mediastinal lymph node enlargement was isolated or associated with lung involvement. Bone metastases demonstrated either an osteoblastic or a mixed osteolytic-osteoblastic pattern in 47% of the instances. Ivory vertebrae were identified in three patients. Because of the significance of identifying metastatic disease before any extensive curative bladder surgery, we recommend at least a preoperative chest radiograph, a bone scan, and a liver scan.
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