Benign Mesothelioma refers to non-cancerous growths of mesothelial cells that do not invade surrounding tissues or metastasize to other parts of the body. In contrast, malignant Mesothelioma is a cancerous growth characterized by the uncontrolled proliferation of abnormal mesothelial cells, invasion of nearby tissues, and the potential for metastatic spread, posing a significant threat to health and survival.