how to show probability of classification in probabilistic neural network(PNN)?

I am using PNN for tumor classification.My network is classifying two classes correctly. I want to know with which probability is classifying. net=newpnn(P,T,spread value); out=sim(net,Q); out=vec2ind(out); Para=round(out) where Q is test image net=trained network P=training images feature. T=classes directly it is showing correct class.I want to know the probabilty of classification.Classification is benign and malignant tumors.plz help