Immunohistochemical comparison of CD5, lambda, and kappa expression in primary and recurrent buccal MALT lymphomas (magnification ×630). Immunohistochemical staining of primary tumor sections show that the tumor cells are positive for CD5 (A), kappa (C), and lambda (E). Immunohistochemical staining of recurrent tumor sections show that the tumor cells are weakly positive for CD5 (B) and kappa (D) and negative for lambda (F).
Tanaka et al. Diagnostic Pathology 2011 6:82 doi:10.1186/1746-1596-6-82