“…In acquired forms, they are of late diagnosis and are revealed by fecaluria. They are described in elderly patients and in particular pathologies such as Crohn's disease [3], colonic diverticulosis [4], caecal cancer [5], and more rarely intestinal amoebiasis [6], bladder bilharziasis [7] and intestinal hydatidosis [8], and even in these cases that caeco-vesical fistula remains exceptional. We report an observation of the first case, to our knowledge, of isolated congenital caeco-vesical fistula.…”