BACKGROUND: Accurate measurement of polyp size during colonoscopy is important because of the direct correlation of size with colon cancer. Major studies of colorectal neoplasms have measured polyp size differently. It is also well documented that endoscopists underestimate polyp size frequently. The goal of this prospective study was to determine which one of the five methods of estimating polyp size during colonoscopy is most accurate. METHODS: One hundred colon polyps were measured by means of visual estimation, open biopsy forceps methods, linear probe, a ruler immediately after excision, and after fixation in formalin. The size of the polyps measured outside the body immediately after excision was considered the "gold standard" against which all measurements were compared. RESULTS: Forty-seven polyps were 5 mm or less in diameter, 33 polyps were 5.01 mm to 10 mm, and 20 polyps were more than 10 mm in size. For all polyps the mean difference versus the actual size of the polyps was 3.4% for linear probe, 6.4% for visual estimation, and 12.3% for the forceps. CONCLUSION: Measurement of polyp size by linear probe agreed best with the actual polyp size, followed closely by visual estimation. The open biopsy forceps method was the least accurate.
BACKGROUND: Accurate measurement of polyp size during colonoscopy is important because of the direct correlation of size with colon cancer. Major studies of colorectal neoplasms have measured polyp size differently. It is also well documented that endoscopists underestimate polyp size frequently. The goal of this prospective study was to determine which one of the five methods of estimating polyp size during colonoscopy is most accurate. METHODS: One hundred colon polyps were measured by means of visual estimation, open biopsy forceps methods, linear probe, a ruler immediately after excision, and after fixation in formalin. The size of the polyps measured outside the body immediately after excision was considered the "gold standard" against which all measurements were compared. RESULTS: Forty-seven polyps were 5 mm or less in diameter, 33 polyps were 5.01 mm to 10 mm, and 20 polyps were more than 10 mm in size. For all polyps the mean difference versus the actual size of the polyps was 3.4% for linear probe, 6.4% for visual estimation, and 12.3% for the forceps. CONCLUSION: Measurement of polyp size by linear probe agreed best with the actual polyp size, followed closely by visual estimation. The open biopsy forceps method was the least accurate.
Authors: David Burling; Steve Halligan; Douglas G Altman; Wendy Atkin; Clive Bartram; Helen Fenlon; Andrea Laghi; Jaap Stoker; Stuart Taylor; Roger Frost; Guido Dessey; Melinda De Villiers; Jasper Florie; Shane Foley; Lesley Honeyfield; Riccardo Iannaccone; Teresa Gallo; Clive Kay; Philippe Lefere; Andrew Lowe; Filipo Mangiapane; Jesse Marrannes; Emmanuele Neri; Giulia Nieddu; David Nicholson; Alan O'Hare; Sante Ori; Benedetta Politi; Martin Poulus; Daniele Regge; Lisa Renaut; Velauthan Rudralingham; Saverio Signoretta; Paola Vagli; Victor Van der Hulst; Jane Williams-Butt Journal: Eur Radiol Date: 2006-04-25 Impact factor: 5.315
Authors: S Punwani; S Halligan; P Irving; S Bloom; A Bungay; R Greenhalgh; J Godbold; S A Taylor; D G Altman Journal: Eur Radiol Date: 2008-01-04 Impact factor: 5.315
Authors: Harvey H Hensley; Carrie E Merkel; Wen-Chi L Chang; Karthik Devarajan; Harry S Cooper; Margie L Clapper Journal: Gastrointest Endosc Date: 2009-03 Impact factor: 9.427
Authors: Ayso H de Vries; Shandra Bipat; Evelien Dekker; Marjolein H Liedenbaum; Jasper Florie; Paul Fockens; Roel van der Kraan; Elizabeth M Mathus-Vliegen; Johannes B Reitsma; Roel Truyen; Frans M Vos; Aeilko H Zwinderman; Jaap Stoker Journal: Eur Radiol Date: 2009-12-22 Impact factor: 5.315
Authors: M H Liedenbaum; A F van Rijn; A H de Vries; H M Dekker; M Thomeer; C J van Marrewijk; L Hol; M G W Dijkgraaf; P Fockens; P M M Bossuyt; E Dekker; J Stoker Journal: Gut Date: 2009-07-21 Impact factor: 23.059
Authors: Ayso H de Vries; Marjolein H Liedenbaum; Shandra Bipat; Roel Truyen; Iwo W O Serlie; Rutger H Cohen; Saskia G C van Elderen; Anneke Heutinck; Oskar Kesselring; Wouter de Monyé; Lambertus te Strake; Tjeerd Wiersma; Jaap Stoker Journal: Eur Radiol Date: 2009-03-20 Impact factor: 5.315