Mesothelioma

An abnormal chest x-ray shows a tumor (arrow) in the lung. In this case, this tumor was diagnosed as a benign mesothelioma. A normal chest x-ray is shown on the right for comparison; the heart (H), lungs (L), vertebrae (v), and collarbone (C) can be seen.

(Left: AP Fishman, Pulmonary Diseases and Disorders, 1 ed, 1980, McGraw- Hill, Fig. 133-1a; right: MY Chen, Basic Radiology, 1996, McGraw-Hill, Fig. 4-1b; with permission.)