In descending order the principal causes were the following: ischemic colitis: 15 patients 30%, probability of infectious colitis: 10 patients 20%, primary ulcerative colitis and colitis resulting from radiation therapy: 9 patients 18% each, other causes: 5 patients 12%.
En orden descendente, las principales causas fueron: colitis isquémica, 15 pacientes 30%, probablemente infecciosa, en 10 pacientes 20%, colitis ulcerativa primaria y colitis pos radioterapia, 9 pacientes cada una 18% y "otras", 5 pacientes 12%.