IgD deposition in glomerulonephritis. An immunopathologic study.

Diffuse deposits of IgD were found in glomerular basement membranes in eight of 263 consecutive renal biopsies by the direct immunofluorescent technic. In five biopsies a granular staining pattern was found and in three a linear pattern was found. IgG and beta1C were present in glomeruli of all eight patients, and IgM in four. Two patients had elevated titers of antithyroglobulin antibodies in the serum, and one patient had anti-glomerular basement membrane antibodies of the IgG class in both serum and renal eluate. This study suggests that IgD may play a role in immunologically mediated glomerular disease. (Key words: IgD; Glomerular deposits; Nephritis.)