What is the mortality rate of fourniers gangrene? i have patient who has that disease and its sad to see him deproving each day.

Too High: Fournier's gangrene, or necrotizing fasciitis of the perineum, has a mortality rate of 40-50%; this may increase to ~75% if one is septic on presentation. The key to rx is aggressive debridement and antibiotics. I hope your patient pulls through.

Age,kidneys,blood,..: In the following study the primary factors effecting mortality are age, renal function and presence of a coagulopathy as the three most important factors influencing mortality. Read the link for more info: http://www.Ncbi.Nlm.Nih.Gov/pubmed/19837424.