Cytogenetic abnormalities identified during the course and treatment of the disease. (A) At diagnosis, the female patient was identified to have karyotypic abnormalities consistent with MDS with deletion 7q and del 20q. (B) After allogeneic stem cell transplantation, she was found to have a donor-derived AML with t(8;21). (C) After her second allogeneic stem cell transplantation, she was found to have another AML with normal karyotype.