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Abstract
Chronic lymphocytic leukemia (CLL), the most common form of leukemia in Western countries, rarely induces glomerular disease, but membranoproliferative glomerulonephritis or immunotactoid glomerulopathy has been reported. The proliferating cells in CLL are of mature B-cell origin and produce monoclonal immunoglobulin (Ig), thus leading to various kinds of autoimmune disorders or immunotactoid glomerulopathy. Although there have been a few reported cases of amyloidosis accompanying CLL, the type of amyloid fibrils has not been demonstrated nor described in detail, particularly regarding monoclonal Ig productivity. We report a rare case of amyloidosis associated with CLL, in which we detected κ-light chain type monoclonal Ig in the sera, urine, and on the surface membrane of lymphocytes, and discuss an association between monoclonal Ig-related disease and non-Hodgkin's lymphoma.
CLL = chronic lymphocytic leukemia; Ig = immunoglobulin; MIDD = monoclonal immunoglobulin deposition disease; MPGN = membranoproliferative glomerulonephritis; NHL = non-Hodgkin's lymphoma; VL = variable region of light chain
CLL = chronic lymphocytic leukemia; Ig = immunoglobulin; MIDD = monoclonal immunoglobulin deposition disease; MPGN = membranoproliferative glomerulonephritis; NHL = non-Hodgkin's lymphoma; VL = variable region of light chain
