We describe 2 cases in which small cell lung cancer presented an unusual pattern of progression that mimicked malignant pleural mesothelioma on diagnostic imaging. The patients were a 74-year-old man and a 69-year-old woman, both of whose chest roentgenograms and CT scans showed irregular right pleural thickening with effusion. Small cell lung cancer had been diagnosed by routine examination in the former patient, but the latter had been given a clinical diagnosis of pleural mesothelioma until postmortem examination, which showed small cell lung cancer. The right lung of each patient was found to be fused to the thorax by a thick layer of tumor cell involvement on postmortem examination.
- Malignant pleural mesothelioma
- Pleural involvement
- Postmortem examination
- Small cell lung cancer
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