Pit pattern type analyses of colon polyps with high-resolution colonoscope.
OBJECTIVE
Correlations among pit pattern types and some characteristics of colon polyps were assessed with high-resolution colonoscope in Turkish patients.


METHODS
Sixty-five patients were included in the study. All visible polyps and distal 30cm of colon were stained with indigo carmine 0.4% after standard colonoscopic examination. Then, pit pattern analyses were done. Correlations were evaluated and results were interpreted as significant if p < 0.05.


RESULTS
There were correlations among the pit pattern types of polyps and their size, location, morphology and histology. Adenomatous polyps (type III,IV,V) were mostly located in the right colon, nonadenomatous polyps (type I/II) were mostly in the left. Ratio of having adenomatous structure increased in a parallel course with increase in polyp's size. While most of the nonadenomatous polyps were with type I,II, adenomatous polyps were with type III, IV, V patterns. Most of the type II, III, IV polyps were sessile and type I polyps were flat. Sensitivity and specificity of adenomatous and nonadenomatous polyps were 80% and 89% respectively and overall accuracy rate was 87%. Type III/IV were the best estimated type among the others. After chromoendoscopy, 35% increase in polyp number was also detected.


CONCLUSIONS
High-resolution endoscope is successful for prediction of histology of colorectal polyps.
Ince
Ali Tüzün
AT
Gastroenterology Clinic, Haydarpasa Numune Education and Research Hospital, Istanbul, Turkey. alince@superonline.com
Bölükbas
Cengiz
C
Peker
Onder
O
Bolükbas
Fusun
F
Ovünç
Oya
O
D000328:Adult; D000368:Aged; D003111:Colonic Polyps / Q000473:pathology*; D020685:Colonoscopes; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012680:Sensitivity and Specificity