A case of synchronous dual hematological malignancy: effects of multiple myeloma therapy on essential thrombocythemia and vice versa

We present a case of synchronous dual hematological malignancies: multiple myeloma (MM) and masked essential Thrombocythemia (ET). Excessive thrombocytosis due to bone marrow recovery occurred during anti-myeloma therapy. Treatment for MM had no effect on ET; concomitant ET did not decrease the efficacy of anti-myeloma therapies in this frail patient.