DSG2 and Miyoshi myopathy: Nor did we observe an increase in soluble DSG2 in the serum of DSG2‐high MM patients, a feature further supported by our observation of the human MM cell lines (e.g. KMS‐11, RPMI8226 and LP‐1) exhibiting only a full‐length version of DSG2 by western blot (data not shown).