Malignant lymphoma of the bone.

Two cases of bone involvement by a malignant lymphoma are described. The first patient suffered from primary, polyostotic non-Hodgkin's lymphoma of lymphoblastic histology, a rare clinical picture according to literature data. The second patient had mediastinal Hodgkin's lymphoma of the nodular sclerosing type with a unique secondary localization in the femoral bone, that led to the final diagnosis. The diagnostic and therapeutical approach of bone lymphoma is discussed.