BAP1 and Miyoshi myopathy: Whether this has relevance to the fact that BAP1 mutation carriers develop a disproportionate number of peritoneal MMs is not known, but it is notable that in the BAP1-TPDS, the peritoneal form of MM predominates (9), which is in stark contrast to the sporadic disease, where peritoneal MM accounts for only 10%–15% of cases (22).