We report a rare case of malignant pleural mesotheliomapresentingclinically with pneumotho ax and histologically with an exclusiveintrapulmonary lepidic growth. Neither intrathoracic nodules norpleural thickening were found. The patient subsequently experiencedacute abdominal painwith peritonitis and intestinal occlusion byperitoneal mesothelioma. The morphologic clues leading to the correct diagnosis of mesothelioma with prominent intrapulmonary growth are briefly discussed.
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