Changes characteristic of bleomycin lung were seen in 15 out of 18 patients whose lungs were examined by computed tomography following standard chemotherapy for testicular cancers. These changes affected mainly the posterior aspects of the lungs and were predominantly subpleural in nature. The total dose of bleomycin given did not appear to correlate with the grade of bleomycin damage. Amongst six patients with adequate follow-up studies there has been improvement in the CT appearance of three.