EGFR and Miyoshi myopathy: These results suggest that activation of several characteristic RTKs, including EGFR, is important for HOMC cell proliferation, as is the case with MM and MeT-5A cell lines, and that stimulation of exogenous factors may also be important in the tissue microenvironment, as suggested by the hypophosphorylation state of MET found in HOMC-D4.