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Tuberculosis & Respiratory Diseases

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Vol.67 No.3
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A Case of Extramedullary Hematopoiesis Presenting as a Lung Mass in a Patient with Primary Myelofibrosis

Tuberculosis & Respiratory Diseases / Tuberculosis & Respiratory Diseases,
2009, v.67 no.3, pp.244-248








& (2009). A Case of Extramedullary Hematopoiesis Presenting as a Lung Mass in a Patient with Primary Myelofibrosis. Tuberculosis & Respiratory Diseases, 67(3), 244-248.
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Abstract

Primary myelofibrosis is characterized by replacement of bone marrow with fibrotic tissue and the development of extramedullary hematopoiesis. Extramedullary hematopoiesis primarily involves the spleen and liver, but can also occur in the lungs. We report the case of an 80-year-old male who was admitted for evaluation of a lung mass and persistent thrombocytopenia. A percutaneous needle aspiration from the mass in the right lower lung showed myelopoietic cells with fatty tissue. A bone marrow biopsy revealed a hypercellular marrow with an increased number of atypical megakaryocytes. The final diagnosis was a prefibrotic stage of primary myelofibrosis leading to extramedullary hematopoiesis in the lung.

keywords
Extramedullary hematopoiesis, Primary myelofibrosis, Lung mass

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