[A rare cause of posterior mediastinal tumors: extramedullary hematopoiesis]. / Une cause rare des tumeurs du médiastin postérieur: l'hématopoïèse extra-médullaire.

We report a case of a patient with intrathoracic extramedullary hematopoiesis presenting as a posterior mediastinal tumor, without associated myelofibrosis. Pathophysiology and the options for diagnosis and treatment in this condition are discussed.