A partial list of genes includes protooncogenes RET and Wingless-related 11 (WNT11) that are well recognized UB-specific molecules, whereas glial cell-line-derived neurotrophic factor (GDNF), Wilms tumor 1 (WT1), and Eyes absent 1 (EYA1) represent important examples of MM-specific factors. This evidence concerns the gene GDNF and Miyoshi myopathy.