What are mesotheliomas?

Benign pleural tumors (mesothelium) rare, malignant mainly pleural (maybe pericardial...) linked to asbestos exposure, give early parietal mesothelial proliferation, massive involvement of pleura formation of nodules and multiple masses, rapid fatality, biphasic proliferation of spindle cells and epithelial slits. Dx by immunohistochemistry and rules out metastasis