title: [Yield of colonoscopy by indication and consequences for colorectal polyp and cancer screening: a prospective survey in Isère, France].
abstract: OBJECTIVE
  The aim of this study was to determine yields of colonoscopy by indication, especially after a positive Hemoccult test, in the Isère area in southeastern France where a mass screening campaign for colorectal cancer using the Hemoccult test was conducted in women aged 50 to 69 years.
  
  
  METHODS
  This prospective survey was conducted with the participation of all gastroenterologists in the Isère department. Information about indications of all colonoscopies performed and their results were collected.
  
  
  RESULTS
  The study involved 1,779 colonoscopies performed for: digestive symptoms (40%), surveillance of colon disease (22%), hematochezia (18%), a family history of colon cancer (10%), anemia, poor general condition or metastasis (4%), and a positive test for blood in the stool (3%). The presence of a pathological colonic condition was significantly related to age (11% of cancers or large polyps after 50 years compared to 3% before), sex (10% of the women with lesions and 15% of the men) and the reason for prescription: after the age 50 a cancer or a large polyp was found in 27% of the cases if the colonoscopy was performed for anemia, metastasis or poor general condition, 21% for hematochezia, 20% for a positive test, 8% for digestive symptoms, and 2% because of a family history.
  
  
  CONCLUSIONS
  Positive Hemoccult tests represent only a small part of the indications for colonoscopies performed in the Isère department. However, the screening program should be extended to develop its use given its yield which is equivalent to that of hematochezia and much higher than that of digestive symptoms or family history.
authors: Office Départemental de Lutte contre le Cancer, 38244 Meylan, France. catherine.exbrayat@odlc.org
authors: Catherine
authors: C
authors: Exbrayat
authors: Anne
authors: A
authors: Garnier
authors: Agathe
authors: A
authors: Billette De Villemeur
authors: Marc
authors: M
authors: Colonna
authors: Philippe
authors: P
authors: Winckel
authors: Jacques
authors: J
authors: Fournet
authors: Patrice
authors: P
authors: Bureau Du Colombier
authors: Michel
authors: M
authors: Bolla
authors: Christine
authors: C
authors: Jestin
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003111:Colonic Polyps / Q000175:diagnosis*; D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000175:diagnosis*; D005260:Female; D005602:France; D006801:Humans; D008297:Male; D008875:Middle Aged; D009780:Occult Blood; D011446:Prospective Studies