MYOM2 and hematologic disorder: Although we note a significantly younger age of MM onset and a modest non-significant increase in the presence of lytic bone lesions in MM patients with a familial coaggregation of hematologic malignancies, we did not observe differences in laboratory characteristics that are typically associated with disease burden including M-protein, abnormal FLC ratio, percent clonal bone marrow plasma cells, and β2-microglobulin, nor did we observe differences by the presence of cumulative organ damage or ISS staging.