Malignant fibrous histiocytoma and fibrosarcoma of bone: a re-assessment in the light of currently employed morphological, immunohistochemical and molecular approaches. by Romeo, S, Bovée, J, Kroon, H, Tirabosco, R, Natali, C, Zanatta, L, Sciot, R, Mertens, F, Athanasou, N, Alberghini, M, Szuhai, K, Hogendoorn, P, Dei Tos, A