Massive bone marrow necrosis as the presenting feature in a case of primary bone marrow high grade non-Hodgkin's lymphoma.

Massive bone marrow necrosis (MBMN) is a rare complication of non-Hodgkin's lymphoma (NHL) and usually occurs in the late stage of the disease. Primary bone marrow NHL with no evidence of disease elsewhere in the lymphoreticular system is also rare. Here a case of primary bone marrow high grade NHL is reported who presented with MBMN without any evidence of nodal or other extra-nodal disease.