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Pericardial Effusion and Atrial Thrombosis: A Rare Complication of Childhood LeukemiaKeywords: Acute Lymphoblastic Leukemia , Extramedullary Leukemia , Pericardial Effusion , Atrial Mass Abstract: Background: Acute lymphoblastic leukemia (ALL) is the most common malignancy diagnosed in children.Extramedullary leukemia including hepatosplenomegaly, lymphadenopathy, and mediastinal mass are theclinical presentations of T-cell ALL. Pericardial effusion and atrial mass are rare presentations of pediatric leukemia.Case Presentation: We report a 15-year-old girl with T-cell ALL, who presented initially with pericardial effusion and cardiac tamponade and subsequently developed right atrial mass. The mediastinal and right atrial masses were excised by surgical procedure as a treatment strategy for prevention of arrhythmia and sudden death.Conclusion: T-cell ALL can present with pericardial and mediastinal involvement as an initial manifestation.Pericardiocenthesis and systemic anticancer chemotherapy without local chemotherapy should be considered in these cases.
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