Definition
A mesothelioma is a malignant neoplasm of pleura.

Pathology
The neoplasm grows to encase the lung and chest wall. Refer to Figure 15-49 in your textbook. Microscopically, the neoplastic cells may resemble mesenchymal stroma (sarcoma) or appear like epithelial cells.

Etiology/Pathogenesis
Asbestosis

Pathophysiology
Recurring pleural effusions, chest pain and dyspnea.