MALIGNANT-LYMPHOMA OF MUCOSA-ASSOCIATED LYMPHOID-TISSUE - A NEW ETIOLOGY OF AMYLOIDOSIS

Non Hodgkin Malignant lymphomas (NHML) of mucosa associated lymphoid t issue (MALT) are known to have multiple involvement of the digestive t ract. We report one case, presenting with an infiltrative process of t he jejuno-ileum, associating lympho-plasmacytoid proliferating cells a nd amyloidosis. The plasmacytoid cells expressed Alpha and scarce Mti heavy chains, and lambda light chain. Lympho-epithelial lesions were m ore obvious at the second site of involvement, in the gastric mucosa. The amyloid substance was negative with the Amyloid A component antibo dy and gave a background noise with Alpha, Mu and lambda chains. No si milar report of amyloidosis associated with MALT NHML has been found i n the literature.