title: Microscopic colitis -- a common cause of diarrhoea in older adults.
abstract: Diarrhoeal diseases are common in older populations and often markedly affect their quality of life. Although there are numerous potential causes, microscopic colitis (MC) is increasingly recognised as a major diagnostic entity in older individuals. MC is comprised of two distinct histological forms - collagenous colitis and lymphocytic colitis, both of which frequently occur in older populations. Recent studies suggest that between 10 and 30% of older patients investigated for chronic diarrhoea with an endoscopically normal appearing colon will have MC. It is unclear why MC is more common in older populations, but it is associated with both autoimmune disorders and several drugs that are commonly used by seniors. A definitive diagnosis can only be made with colonic biopsies. Since MC was first described in 1976 and only recently recognised as a common cause of diarrhoea, many practising physicians may not be aware of this entity. In this review, we outline the epidemiology, risk factors associated with MC, its pathophysiology, the approach to diagnosis and the management of these individuals.
authors.affiliation: Division of Gastroenterology, Department of Medicine, University of Calgary, Calgary, Alberta, Canada.
authors.forename: Jennifer J
authors.initials: JJ
authors.lastname: Williams
authors.forename: Paul L
authors.initials: PL
authors.lastname: Beck
authors.forename: Christopher N
authors.initials: CN
authors.lastname: Andrews
authors.forename: David B
authors.initials: DB
authors.lastname: Hogan
authors.forename: Martin A
authors.initials: MA
authors.lastname: Storr
mesh_terms: D000328:Adult; D000930:Antidiarrheals / Q000627:therapeutic use*; D001706:Biopsy; D002908:Chronic Disease; D046728:Colitis, Microscopic / Q000150:complications* / Q000453:epidemiology / Q000473:pathology / Q000628:therapy; D003113:Colonoscopy; D003967:Diarrhea / Q000188:drug therapy / Q000209:etiology* / Q000473:pathology; D005765:Gastrointestinal Agents / Q000627:therapeutic use*; D006801:Humans; D011379:Prognosis; D012307:Risk Factors; D012737:Sex Factors
chemical_list: D000930:Antidiarrheals; D005765:Gastrointestinal Agents