Lesions of the ileum associated with ulcerative colitis

Ileitis in Ulcerative Colitis: Is It a Backwash?

“…In autopsy studies the extent of ileal inflammation varied from 3 to 45 cm. 1,16 For the same reason we do not know whether this involvement occurred early in the course of the colitis or whether it was a terminal event in the downhill progress of the disease.…”

Coexistent ulcerative colitis and Crohn's disease

“…The histology was characteristic of Crohn's disease with transmural inflammation and deep fissures. The appearance was not that of a back-wash ileitis (Counsell, 1956). Radiologically and at operation the colitis appeared to be distal involving the rectum and sigmoid colon, although histologically there were more extensive changes indicating a pan-colitis.…”

“…With one exception (Otani, 1955) early reports of coexistent Crohn's disease and ulcerative colitis lacked sufficient pathological criteria to substantiate the claimed association (Warren & Sommers, 1954;Counsell, 1956;Colcock & Vansont, 1961;Edwards & Truelove, 1964;Evans & Acheson, 1965;Mendeloffet al, 1966). With the recognition of colonic Crohn's disease and the establishment of clear pathological criteria for Crohn's disease and ulcerative colitis, it has become apparent that the concurrence of these two conditions is extremely rare.…”

Practical points in the pathology and surgical treatment of ulcerative colitis. A critical review

“…Though there is still much to be learnt about the inflammatory conditions affecting these parts of the intestine, certain facts have become more clear as a result of experience and study (Warren and McKittrick, 1951 ;Counsell, 1956) and can perhaps usefully be summarized here :-I. By far the most common ileal lesion seen is that due to extension of the colitis by continuity into the terminal ileum.…”