the b cell lymphoproliferative process included minute mesenteric and omental aggregates of plasma cells and small lymphocytes ( one rat ) , atypical partially fibrotic lymphoproliferative mesenteric nodules ( three rats ) , and malignant lymphoma with features of immunoblastic sarcoma ( eight rats ) or plasma cell lymphoma ( two rats ) .
C0025474
mesenteric
C0028977
omental