Fig. 4.

Findings of renal biopsy (second biopsy). Seventeen glomeruli were counted, and 6 of them were deteriorated. PAM staining of non-deteriorated glomeruli revealed notable spike formation, and IF showed deposits of IgG but no deposits of C3. In the determination of the IgG subclass, the results were positive for IgG1 and IgG4. No glomeruli were present in the electron microscopic specimens, but a diagnosis of membranous nephropathy (stage II–III) was determined from optical microscopic findings