MYOM2 and breast cancer: Of the 19 patients who had a positive M‐protein in the matched‐only group, 10 had hematologic cancer (7 had multiple myeloma (MM), 1 had marginal zone lymphoma, 1 had follicular lymphoma, and 1 had chronic myelogenous leukemia), 3 had nonhematologic cancer (1 breast cancer, 1 colon cancer, and 1 prostate cancer), and 6 had no history of cancer.