Studies of tandem colonoscopies have reported that 15-25% of neoplastic polyps<1 cm in size and 0-6% of larger polyps are overlooked at the time of colonoscopy.
We determined the miss rate and « true » 1-yr recurrence of neoplastic polyps in a population of patients reflecting a broad spectrum of different gastroenterology practice settings.
Patient data from several sources were examined for repeat colonoscopies performed on the same patient within 120 days of each other.
Examination pairs were included for analysis if both colonoscopies had good preps and reached the cecum.
The miss rate was calculated by two methods : 1) a pooled rate, the total number of polyps on all second examinations divided by the total number on both examinations, and 2) a within-person rate, the average of the individual miss-rates.
We estimated a « true » 1-yr recurrence rate by subtracting the proportion of patients with a missed neoplastic polyp from the proportion of patients with a neoplastic polyp found at 1 yr.
A total of 76 colonoscopy pairs a mean 47 days apart (range, 1-119 days) were identified from a total of approximately 15,000 examinations and used to calculate the overall miss rates.
For the category « all polyps » (neoplastic and nonneoplastic polyps), 17% by the pooled method and 11% by the within-person method were missed.
The corresponding rates for neoplastic polyps were 12% by the pooled method and 8% by the within-person method. (...)
Mots-clés Pascal : Côlon, Rectum, Polype, Tumeur maligne, Etude comparative, Taux défaillance, Colonoscopie, Exploration clinique, Récurrence, Evaluation, Homme, Appareil digestif pathologie, Côlon pathologie, Rectum pathologie, Endoscopie
Mots-clés Pascal anglais : Colon, Rectum, Polyp, Malignant tumor, Comparative study, Failure rate, Colonoscopy, Clinical investigation, Recurrence, Evaluation, Human, Digestive diseases, Colonic disease, Rectal disease, Endoscopy
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0118849
Code Inist : 002B24E06. Création : 16/11/1999.