Robert N. Allan

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A retrospective cohort of 823 patients with ulcerative colitis who resided at the time of diagnosis in one of three defined geographical areas (West Midlands region, Oxford region, England and Stockholm County, Sweden) was assembled. The patients were first seen at named hospitals in these areas and the diagnosis of ulcerative colitis established within(More)
The risk of developing colorectal cancer has been compared in two identically selected cohorts of patients with extensive Crohn's colitis (n = 125) and extensive ulcerative colitis (n = 486). In both groups the effects of selection bias have been reduced wherever possible. There was an 18-fold increase in the risk of developing colorectal cancer in(More)
PURPOSE This study examined risk factors for intra-abdominal sepsis after surgery in Crohn's disease. METHODS We reviewed 343 patients who underwent 1,008 intestinal anastomoses during 566 operations for primary or recurrent Crohn's disease between 1980 and 1997. Possible factors for intra-abdominal sepsis were analyzed by both univariate (chi-squared(More)
BACKGROUND The aim of this retrospective study was to compare complications and anastomotic recurrence rates after stapled functional end-to-end versus conventional sutured end-to-end anastomosis after ileocolonic resection in Crohn disease. METHODS Between 1988 and 1997, 123 patients underwent ileocolonic resection for Crohn disease. Forty-five patients(More)
Two hundred and ten patients with coeliac disease previously reported from this unit were reviewed at the end of 1985 after a further 11 years of follow up. The initial review at the end of 1974 could not demonstrate that a gluten free diet (GFD) prevented these complications, probably because the time on diet was relatively short. The same series has(More)
The outcome among 39 patients with enterocutaneous fistulae complicating Crohn's disease has been reviewed. The patients were considered in two groups: (1) no disease - all were early postoperative fistulae (n = 9); (2) active disease (i) without abscess formation (n = 16), (ii) with abscess formation (n = 14). Postoperative fistulae with no evidence of(More)
The natural history of Crohn's disease in 47 patients, 60 years of age or older at the time of diagnosis has been defined, and their clinical management and long term prognosis reviewed. Distal colonic involvement is common in this group while extensive colonic and diffuse small bowel disease is rare. Distal colonic involvement usually carries a good(More)
Radioactive lithocholate was administered intravenously to female rhesus monkeys with an exteriorized enterohepatic circulation, and the chemical form of biliary radioactivity was defined by thin layer chromatography. Most radioactivity was excreted in bile in the form of unsulfated conjugates (77%), indicating impaired sulfation relative to published data(More)