A Rare Case of Immunotactoid Glomerulopathy Associated with Hodgkin Lymphoma

Figure 2

Histopathological evaluation of renal biopsy. (a) PAS (×40). (b) PAS (×100). Stained renal biopsy sections at diagnosis reveal mesangial proliferation and subendothelial deposits (arrowheads). Immunofluorescence staining of these deposits is positive for IgG (c) (×40) and C3 (d) (×40). Immunostaining of the light chain is positive for kappa light chain (e) (×40), negative for lambda light chain (f) (×40), and positive for IgG3 (g) (×40). Using electric microscopy ((h) (×2,500), (i) (×25,000)), these deposits are composed of a tubular structure with a diameter of 50 nm. Black bars in (h) and (i) represent 2.5 μm and 500 nm, respectively.