title: Screening colonoscopy for the detection of neoplastic lesions in asymptomatic HIV-infected subjects.
abstract: BACKGROUND
  Although non-AIDS defining malignancies are rapidly increasing as HIV-infected subjects live longer, little is know about the results of screening for colonic neoplasms (adenomatous polyps and adenocarcinomas) in this population.
  
  
  METHODS
  We conducted a screening colonoscopy study to determine the prevalence of colonic neoplasms in 136 asymptomatic HIV-infected subjects >or=50 years of age and 272 asymptomatic uninfected control subjects matched for age, sex, and family history of colorectal cancer. Advanced neoplasms were defined as adenomas >or=10 mm or any adenoma, regardless of size, with villous histology, high-grade dysplasia, or adenocarcinoma.
  
  
  RESULTS
  The prevalence of neoplastic lesions was significantly higher in HIV-infected subjects than in control subjects (62.5% vs 41.2%, p<0.001), and remained highly significant after adjustment for potential confounding variables (odds ratio = 3.00; 95% confidence interval, 1.83 to 4.93). Among patients with colorectal adenocarcinoma, HIV-infected subjects were significantly younger (52.4 (SD 1.3) vs 60.3 (SD 4.0) years, p = 0.002) and were more likely to have advanced cancers (stage III or IV) than control subjects (60.0% vs 16.7%, p = 0.24). Of HIV-infected subjects with advanced neoplasms proximal to the splenic flexure, distal neoplastic lesions were absent in 88.9% of individuals and these would have been missed by flexible sigmoidoscopy.
  
  
  CONCLUSIONS
  HIV-infected subjects have a higher prevalence of colonic neoplasms, and adenocarcinomas develop at a younger age and are more advanced than in uninfected subjects. Our findings suggest that screening colonoscopy should be offered to HIV-infected subjects, but the age of initiation and the optimal frequency of screening require further study.
authors.affiliation: Division of Gastroenterology (111D), VA New York Harbor Healthcare System, New York, NY 10010, USA. Edmund.Bini@med.va.gov
authors.forename: E J
authors.initials: EJ
authors.lastname: Bini
authors.forename: B
authors.initials: B
authors.lastname: Green
authors.forename: M A
authors.initials: MA
authors.lastname: Poles
mesh_terms: D000230:Adenocarcinoma / Q000150:complications / Q000175:diagnosis* / Q000473:pathology; D000236:Adenoma / Q000150:complications / Q000175:diagnosis* / Q000473:pathology; D000368:Aged; D023241:Antiretroviral Therapy, Highly Active; D018791:CD4 Lymphocyte Count; D003110:Colonic Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000473:pathology; D003113:Colonoscopy; D005260:Female; D015658:HIV Infections / Q000150:complications* / Q000188:drug therapy / Q000276:immunology; D006801:Humans; D008297:Male; D008403:Mass Screening / Q000379:methods; D008875:Middle Aged; D011446:Prospective Studies; D012307:Risk Factors