To diagnose the most frequent types of colitis, the following endoscopic and/or colonoscopic and histological characteristics were taken into consideration 6: Colonoscopic indications: edema, diffuse erythma, granularity, lost of vascular pattern, friability with spontaneous bleeding or at contact with colonoscope, exuded or confluences, superficial ulcerations.
Endoscopia: edema, eritema difuso, granularidad, pérdida del patrón vascular, friabilidad con sangrado espontáneo o al contacto con el colonoscopio, exudado o ulceraciones superficiales, confluentes, continuas, sin dejar áreas sanas interpuestas entre mucosa enferma, compromiso rectal 7.