[Pseudotumor extramedullary hematopoiesis. Report of 3 cases and review of the literature]

We report 3 cases of extramedullary hematopoiesis with a sacrococcygeal, right obturatory hole and paravertebral dorso lumbar locations respectively in 30, 34 and 58 years old patients (two males and woman). A medullary tuberculosis was discovered in one case, a beta thalassemia in the second, and the third was classified as idiopathic. Radiologic picture often permitted to evoke the diagnosis on the aspect of a well limited multilocular tumor especially when there is a paravertebral location as in our third patient. Fine needle punction cytologic examination can permit the diagnosis and avoid surgery, except if complications occur.