[Membrane structures in 13 cases of focal segmental glomerulosclerosis]

13 cases of focal segmental glomerulosclerosis have been studied in needle-biopsy material. In various structural elements of glomeruli electronmicroscopically MS of different shape and size were found. Contrary to the findings of other investigators similar elements in other types of glomerulopathia were not revealed. Author believes that presence of MS in focal segmental glomerulosclerosis is of diagnostic value.