How useful is colonoscopy in locating colorectal lesions?

Jiménez

et al. 2012

Rev. esp. enferm. dig.

Introduction: accurate preoperative localization of colorectal cancer (CRC) is very important, with a wide range of published error rates.Aims: to determine accuracy of endoscopic localization of CRC in comparison with preoperative computed tomography (CT). To analyse variables that could be associated with a wrong endoscopic localization.Patients and methods: endoscopic and CT localization of a series of CRC without previous surgery were reviewed. We studied the concordance between endoscopic and radiologic localization against operative findings comparing accuracy of endoscopy and CT. We analysed the frequency of wrong endoscopic diagnoses with regard to a series of patient, endoscopy and tumor variables.Results: two hundred thirty seven CRC in 223 patients were studied. Concordance with surgical localization was: colonoscopy = 0.87 and CT = 0.69. Endoscopic localization accuracy was: 91.1%; CT: 76.2%: p = 0.00001; OR = 3.22 (1.82-5.72). Obstructive cancer presented a higher rate of wrong localization: 18 vs. 5.7% in non-obstructive tumors (p = 0.0034; OR = 3.65 (1.35-9.96). Endoscopic localization mistakes varied depending on tumor location, being more frequent in descending colon: 36.3%, p = 0.014; p = 0.007;.Conclusions: endoscopic accuracy for CRC localization was very high and significantly better than CT accuracy. Obstructive tumor and those located in the descending colon or cecum were associated with a significant increase of the error risk of CRC endoscopic localization.

Section: Introductionmentioning

confidence: 99%

Endoscopic localization of colorectal cancer: Study of its accuracy and possible error factors

Jiménez

et al. 2012

Rev. esp. enferm. dig.

Khir. Z. im. N.I. Pirogova

“…Всеми авторами отме-чается, что наибольшую сложность представляет то-пическая диагностика новообразований попереч-ной ободочной кишки, точность которой составляет лишь 30% [5][6][7][8][9][10][11][12][13][14][15][16].…”

Section: Endoscopic Tattooing Of Colorectal Neoplasms and Laparoscopiunclassified

Endoscopic tattooing of colorectal neoplasms and laparoscopic surgery: technical aspects and recommendations

Bashankaev

Shishin

Веселов

et al. 2017

Accurate mapping of colorectal neoplasms is needed in many clinical situations. Intraoperative mapping of small lesions previously detected by endoscopy is often challenging, especially during laparoscopic surgery. Tumor location assessed during colonoscopy may be inaccurate because of limitations of the procedure. Small flat neoplasms with signs of invasiveness, which are hard to detect by palpation, hold a special place. The same situation is observed for nonradical endoscopic resection of malignant polyps or early cancer, when visual examination shows that the tumor masses have been completely resected but histological examination reveals the positive lateral or horizontal resection margin. Endoscopic tattooing is an effective, safe, and economically sound method to mark intraluminal colorectal neoplasms, which allows one to perform minimally invasive surgeries without using additional operating room resources.

“…Incorrect localization of the endoscope tip is most frequently reported between the sigmoid colon and the splenic flexure [5,7], or between the transverse and right colon [4,6].…”

mentioning

confidence: 99%

“…However, the inherent elasticity of the colon, variability in colonic anatomy, and the absence of fixed internal landmarks (at least until the ileocaecal valve can be reached and reliably identified) makes it difficult to localize the endoscope tipp accurately during insertion, even for experienced endoscopists [4 -7]. Incorrect localization of the endoscope tip is most frequently reported between the sigmoid colon and the splenic flexure [5,7], or between the transverse and right colon [4,6].Precise localization of lesions is imperative prior to surgery [5, 8 -10], particularly for nonpalpable cancers or sessile polyps. For these reasons, barium enema is sometimes used as an adjunctive technique for preoperative localization of lesions and for visualization of the proximal colon in cases in which colonoscopy is incomplete [5,6,8,11].…”

mentioning

confidence: 99%

Magnetic Endoscope Imaging: A New Technique for Localizing Colonic Lesions

Moss

et al. 2002

Endoscopy