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Intramembranous microspherical structures in focal segmental glomerulosclerosis

, : Intramembranous microspherical structures in focal segmental glomerulosclerosis. Clinical and Experimental Nephrology 12(6): 504-508

A 45-year-old male had proteinuria for 3 years. For persistent proteinuria over 2 g/day, he underwent renal biopsy. Light microscopy revealed focal segmental glomerulosclerosis together with diffuse capillary wall thickening. Periodic acid methenamine silver (PAM) staining showed a prominent bubbly appearance without spike formation could be found in almost all capillary walls. Electron microscopy revealed many microspheres measuring 50-70 nm in diameter distributed in diffuse and global fashion together with the thickened glomerular basement membrane. A few cytoplasmic processes of the podocytes showed infolding to the GBM. The patient exhibited no symptoms and no physical and serological findings suggesting autoimmune disease, such as systemic lupus erythematosus or Sjögren's syndrome. Therefore, the present case is important, because the peculiar microstructure in the GBM was noted in focal segmental glomerulosclerosis, which has never been reported in the literature.


PMID: 19002748

DOI: 10.1007/s10157-008-0101-2

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