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  • Title: Thoracic Extramedullary Hematopoiesis Mimicking Metastatic Cancer.
    Author: Ha D, Liao X, Wang HY, Jamieson C, Magaña M, Makani S.
    Journal: J Bronchology Interv Pulmonol; 2016 Oct; 23(4):343-346. PubMed ID: 27479013.
    Abstract:
    Thoracic extramedullary hematopoiesis (EMH) is a rare manifestation in patients with myeloproliferative neoplasm. A 76-year-old woman with a long-standing history of polycythemia vera presented with a 2-month history of worsening dyspnea and left-sided wheezing. A chest computed tomography showed an ill-defined soft tissue mass encasing the left mainstem bronchus causing airway obstruction, associated with paratracheal and paraesophageal lymphadenopathy. Endobronchial ultrasound-guided fine needle aspiration of the soft tissue mass and mediastinoscopy with excisional biopsy of a paratracheal lymph node demonstrated EMH with increased myeloid blasts. A bone marrow biopsy confirmed postpolycythemic myelofibrosis consistent with progression of polycythemia vera to myelofibrosis. We describe the bronchoscopic management of a case of EMH presenting as a mediastinal mass, mimicking malignancy.
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