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EXTRAMEDULLARY HEMATOPOIESIS AS A RENAL MASS IN A PATIENT WITH OSTEOPETROSIS

Extramedullary hematopoiesis is an extension of marrow beyond its bony casement. It is associated with a number of diseses when the normal function of marrow is disturbed. A large accumulation of Extramedullary hematopoiesis may occur at the paravertebral area, mediastinum, spleen and liver. Intrarenal extramedullary hematopoiesis is rare.Only a few cases have been reported of myelofibrosis and idiopathic thrombocytopenic purpura. We report a cases of intrarenal Extramedullary hematopoiesis that mimicked a renal tumor. A 23 year-old man which is known case of osteopetrosis presented with pancytopenia and abdominal mass.