Fig. 4From: Ileal mucosa-associated lymphoid tissue lymphoma presenting with small bowel obstruction: a case report a Clusters of plasma cells located near the mucosal surface. CD138 immunohistochemical stain. 200x. b Plasma cells with predominantly kappa light chain. Kappa in situ hybridization. 200x. c Rare plasma cell with lambda light chain. Lambda in situ hybridization. 200xBack to article page