Fuzzy expert system for prediction of prostate cancer

A fuzzy expert system (FES) for the prediction of prostate cancer (PC) is prescribed in this article. Age, prostate-specific antigen (PSA), prostate volume (PV) and % Free PSA (%FPSA) are fed as inputs into the FES and prostate cancer risk (PCR) is obtained as the output. Using knowledge based rules in Mamdani type inference method the output is calculated. If PCR ≥ 50%, then the patient shall be advised to go for a biopsy test for confirmation. The efficacy of the designed FES is tested against a clinical data set. The true prediction for all the patients turns out to be 68.91% whereas only for positive biopsy cases it rises to 73.77%. This simple yet effective FES can be used as supportive tool for decision making in medical diagnosis.