Which ofthe following is he most prominent feature of immunoproliferative small intestinal disease (IPSID)-

Immunoproliferative small intestinal disease (IPSID) was recently added to the growing list of infectious pathogen-associated human lymphomas. IPSID lymphomas reveal excessive plasma cell differentiation and produce truncated alpha heavy chain proteins lacking the light chains as well as the first constant domain Abdominal pain impoant feature of IPSID Ref Davidson edition23rd pg 818