Cyclophosphamide-induced Cardiotoxicity with a Prolonged Clinical Course Diagnosed on an Endomyocardial Biopsy
2013
A 31-year-old woman with primary mediastinal large B-cell lymphoma refractory to conventional chemo- therapy was treated with high-dose chemotherapy containing cyclophosphamide (CY). Subsequently, she was treated with auto peripheral blood stem cell transplantation. Although a complete remission was obtained, heart failure developed two months later. Echocardiography showed an impaired systolic function with peri- cardial effusion. A biopsy of the endomyocardial region from the left ventricle demonstrated spotty myocar- dial hemorrhage and myocardial fibrosis with disruption and aggregation of mitochondrial cristae. Based on these findings, CY-induced cardiotoxicity was diagnosed. The patient was treated with conventional therapy for heart failure, which required approximately one year to improve her condition.
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