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3. Plasmacytoma of pancreas and duodenum causing acute intestinal obstruction;Hufferman, A.;Lancet 1947
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5. Duodenal plasmacytoma: a rare extramedullary localisation simulating a carcinoma;Pentimone, F.; Camici, M.; Cini, G.; Levorato, D.;Acta Haemat,1979