LPL and MALT lymphoma: Eight patients underwent immunohistochemical studies of renal tissue, of which three patients (CLL, n=1; LPL, n=1; WM, n=1) had confirmed malignant lymphocytic infiltration (Figure 2), and the infiltrating cells in the remaining five patients (CLL, n=1; MALT lymphoma, n=2; MGUS, n=2) were considered unrelating to lymphoma.