Abstract
Intrathoracic extramedullary hematopoiesis is a rare and usually asypmtomatic disease. In a 31-year-old man with b-thalassemia intermedia was incidentally found to have right hilar mass. In computerized tomography paravertebral mass lesions were detected. Cytological analysis of fine needle aspiration revealed diagnosis of extramedullary hematopoiesis. The patient did not receive any therapy because he was asymptomatic and he is on our follow up.