We report a 30-year-old female admitted for an acute renal failure (ARF) as initial sign of idiopathic membranous glomerulonephritis. Severe ARF needed hemodialysis and renal biopsy after three weeks of evolution. Pathological examination revealed membranous glomerulonephritis mixed focal segmental glomerulosclerosis. Oral corticosteroids with hemodialysis allowed to obtain complete regression of ARF and partial remission of membranous glomerulonephritis. This case report call also to answer the question about existence of "tropical extramembranous glomerulonephritis" described in Dakar, more than twenty years ago.