The C-terminal part of EWS-Oct-4B, isolated in a hidradenoma of the skin and a mucoepidermoid carcinoma of the salivary gland (Moller et al, 2008), was found to be more similar to that of Oct-4B than to that of Oct-4A. Here, EWSR1 is linked to salivary gland mucoepidermoid carcinoma.