The GF is a fulminant infection, affects any age and gender. Described the severity index for Fournier"s gangrene (ISGF), which is useful in assessing the prognosis of these patients. OBJECTIVE. Report our experience with this disease over the past 12 years and to evaluate the predictive value of ISGF retrospectively. METHODS we reviewed medical records of patients with GF of the last 12 years in the HUS. Identified factors associated with mortality and an analysis of calibration and discrimination of ISGF. RESULTS 40 patients were collected from all male with an average age of 60.3 years (+ / - 14.9). The most frequent comorbidity and etiology were hypertension and urological causes. The most common pathogen was E. coli. The mortality rate in our population was 15%. The ISGF and ISGF adjusted average was on 4.9 and 9.83, 9.83 and 4.91 for the deceased and not deceased respectively, with a statistically significant difference for both. (P <0.05). In the correlation, discrimination and consistency analysis, the ISGF overestimates mortality and ISGF adjusted underestimate mortality, but has a good correlation with mortality DISCUSSION: In our hospital, the GF is an uncommon disease, in spite of this, there is a rapid diagnosis and immediate management turn. So far, the immediate surgical treatment and early initiation of antibiotic therapy remains the best therapeutic option. There is a relationship between severity index and patient survival, which may become a useful parameter in evaluating these patients. However prospective studies are needed to validate the scale in our population