Testicular Mesothelioma Testicular mesothelioma is the rarest form of mesothelioma cancer and is found in the serous membrane, or “tunica vaginalis,” surrounding the testes in men. While it is considered highly aggressive and is known to metastasize rather quickly, testicular mesothelioma accounts for only 1% of 3,000 diagnosed mesothelioma cases in the United States each year. TESTICULAR MESOTHELIOMA SYMPTOMS Mesothelioma cancer is caused by the exposure to asbestos. Once the initial exposure to asbestos occurs, mesothelioma can take anywhere from 10 to 60 years to develop as the asbestos fibers build up, creating scar tissue, and eventually, mesothelioma cancer. Mesothelioma is often misdiagnosed, as mesothelioma victims may be years removed from the exposure once the mesothelioma cancer has developed and is detected. In particular, testicular mesothelioma is often initially diagnosed as a hernia, and typically not found to be mesothelioma until surgery is performed. While ...