In human the genes cyclin-dependent kinase inhibitor 2A (CDKN2A), neurofibromatosis type 2 (NF2), the breast cancer associated gene 1 (BRCA1) associated protein 1 (BAP1) and tumorsuppressorprotein 53 (TP53) genes seem to be major players in MM-pathogenesis and -progression [7–16]. The gene discussed is BAP1; the disease is Miyoshi myopathy.