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Deprecated: Implicit conversion from float 278.79999999999995 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 CEN+Case+Rep 2013 ; 2 (2): 222-7 Nephropedia Template TP
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Proliferative glomerulonephritis with monoclonal IgM-? deposits in chronic lymphocytic leukemia/small lymphocytic leukemia: case report and review of the literature #MMPMID28509294
Oe Y; Joh K; Sato M; Taguma Y; Onishi Y; Nakayama K; Sato T
CEN Case Rep 2013[Nov]; 2 (2): 222-7 PMID28509294show ga
A 48-year-old man with chronic lymphocytic leukemia presented with nephrotic syndrome, hematuria, and mild deterioration of renal function. Further analysis using serum immunofixation electrophoresis detected monoclonal immunoglobulin (Ig) M-? and IgG-? M-protein. Testing for cryoglobulin in serum was negative. Light microscopy of a renal biopsy specimen showed membranoproliferative glomerulonephritis features with marked mononuclear cell infiltration in the interstitium. On immunofluorescence study, the deposition of IgM heavy chain was predominantly observed with the same distribution of ? light chain, whereas no ? light chain was found. Electron microscopy revealed fine granular deposits in the mesangial, subendothelial, and subepithelial areas, mimicking those observed in the immune complex-mediated glomerulonephritis. These pathological findings were consistent with recently described cases of proliferative glomerulonephritis with monoclonal IgG deposits. Thus, monoclonal IgM deposition can also cause proliferative glomerulonephritis.