Extensive crescent formation in idiopathic membranous glomerulonephritis. A case report.

Idiopathic membranous glomerulonephropathy is a well defined clinical and pathological entity (Cluck et al, 1973). It is postulated to be an immune-complex disease. There seems to be some variation in the life expectancy in this group of patients, nonetheless most agree that slow progression to renal failure is usual. Evolution of membranous nephropathy to a rapidly progressive crescentic glomerulonephritis is extremely rare. Isolated cases have been documented by Klassen et al, (1974), Nicholson et al (1975) and Moorthy et al (1976).