Rare malignancies associated with mesothelioma.

In addition to the above, rare kinds of mesothelioma have been identified such as: small cell mesothelioma and lymphohistiocytoid mesothelioma. (c) Due to their rarity, testicular and pericardial mesothelioma could also be classified in this category. As well, in the peritoneal category, there are mesos such as: benign/low grade proliferations, well differentiated papillary tumors, and peritoneal inclusion cysts. (n)

The human genital tracts have also been found to contain adenomatoid tumors, which were originally thought to be endothelial. Recent research has reclassified these as a benign form of mesothelioma. From time to time, such incidental tumors have been discovered in the pleural cavities during lung resections for other reasons. There source and clinical development of these tumors remains unknown.