Occurence of crescentic formation superimposed to idiopathic membranou
s glomerulopathy worsens severely its prognosis with evolution to end
stage renal disease. We report the case of a 65 years old man with nep
hrotic idiopathic membranous glomerulopathy who subsequentely develope
d an acute renal failure secondary to crescentic formation. Pulse of h
ight dose methylprednisolone administration improved renal function. S
even similar observations are analysed and pathogenic mechanisms discu
ssed.