A Comparative Evaluation of Different Histopathological Indices of Mucosal Healing in Ulcerative Colitis

* To evaluate the histological activity and the presence of specific histopathologic features at diagnosis in ulcerative colitis patients before and after receiving treatment using the three most widely- used histological scoring indices (Gobeos score , Robarts Histopathologic Index and Nancy Index ) * To compare the findings of the three histopathological indices with each other as a trial to select the best, reproducible, easily and consistently applied system that could be adopted in routine pathological evaluation. Moreover, an attempt to introduce a novel customized method of histopathological evaluation could be carried out. * To correlate the clinical and endoscopic follow up data of patient on treatment with the histopathological evaluation. This will be done in order to evaluate the possible predictive effect of histopathological evaluation on the disease course and hence as a tool to drive possible modification of the therapeutic choices