“… 10 Isolated cardiac relapse after allogeneic peripheral blood HSCT is rarely reported, with only scattered cases in the literature, mostly presenting as solid myeloid sarcoma or myocardial hypertrophy and constrictive cardiac physiology. 11 – 13 The patient in this case presented with an isolated cardiac effusion without evidence of myeloid sarcoma or involvement outside the cardiovascular system during her first IEMR. In some studies, it was reported that IEMR has a better prognosis than bone marrow relapse, 7 , 9 which seems consistent with our case.…”