“…5,15,28,41,48,70,71 Eleven papers examined kappa and lambda restriction in mucosal lesions, including oral, ocular and genital mucosa. 9,10,23,28,33,35,45,50,56,58,60 When histopathologic features were fully described, plasma cells were inconspicuous to absent in FCL, 28,37,41 MCL, 28 DLBCL, 37,41 and most cases of CLL/SLL, 25,26,39,55 and light chain restriction was recognized in some cases by weak staining of Bcells. 31,41 Non-neoplastic infiltrates examined using kappa and lambda IHC and ISH included reactive lymphoid hyperplasia (cutaneous lymphoid hyperplasia, atypical lymphoid hyperplasia, "lymphocytoma F I G U R E 1 Primary cutaneous marginal zone lymphoma.…”