Abstract
Aim of this chapter is to describe the normal anatomy of the colon on the basis of 2D and 3D CT colonography criteria.
In normal colon the wall thickness is thin (less than 2 mm) and may increase to 5 mm in collapsed segments.
The colon is generally recognized by three morphologic key features, which can be clearly identified in CT colonography: the semilunar folds, the taeniae, and the haustra.
The normal colon typically is divided in antegrade order into six segments: the cecum with the ileocecal valve and the appendix, the ascending colon, the transverse colon, the descending colon, the sigmoid colon, and the rectum. The splenic and the hepatic flexure should not be considered separate segments.
The ileocecal valve has a variable appearance, being classified as either labial, when it appears as a slit-like opening; papillary, when its shape is dome-like; or intermediate.
Cases showing the normal colon anatomy are presented in the chapter.
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References
Fenlon HM, Clarke PD, Ferrucci JT (1998) Virtual colonoscopy: imaging features with colonoscopic correlation. AJR Am J Roentgenol 170(5):1303–1309
Macari M, Megibow AJ (2001) Pitfalls of using three-dimensional CT colonography with two-dimensional imaging correlation. AJR Am J Roentgenol 176(1):137–143
Silva AC, Wellnitz CV, Hara AK (2006) Three-dimensional virtual dissection at CT colonography: unraveling the colon to search for lesions. Radiographics 26(6):1669–1686
Mang T, Maier A, Plank C, Mueller-Mang C, Herold C, Schima W (2007) Pitfalls in multi-detector row CT colonography: a systematic approach. Radiographics 27(2):431–454
Neri E, Halligan S, Hellström M (2012) ESGAR CT Colonography Working Group. Eur Radiol. Sep 15. [Epub ahead of print] PMID: 22983280
Wiesner W, Mortele KJ, Ji H, Ros PR (2002) Normal colonic wall thickness at CT and its relation to colonic distension. J Comput Assist Tomogr 26(1):102–106
Mang T, Schima W (2009) CT-Kolonographie, 1st ed. Georg Thieme Verlag, Stuttgart
Horton KM, Corl FM, Fishman EK (2000) CT evaluation of the colon: inflammatory disease. Radiographics 20(2):399–418
Zalis ME, Barish MA, Choi JR et al (2005) CT colonography reporting and data system: a consensus proposal. Radiology 236(1):3–9
Khashab MA, Pickhardt PJ, Kim DH, Rex DK (2009) Colorectal anatomy in adults at computed tomography colonography: normal distribution and the effect of age, sex, and body mass index. Endoscopy 41(8):674–678
Silva AC, Beaty SD, Hara AK et al (2007) Spectrum of normal and abnormal CT appearances of the ileocecal valve and cecum with endoscopic and surgical correlation. Radiographics 27(4):1039–1054
Iafrate F, Rengo M, Ferrari R, Paolantonio P, Celestre M, Laghi A (2007) Spectrum of normal findings, anatomic variants and pathology of ileocecal valve: CT colonography appearances and endoscopic correlation. Abdom Imaging 32(5):589–595
Regge D, Gallo TM, Nieddu G et al (2005) Ileocecal valve imaging on computed tomographic colonography. Abdom Imaging 30(1):20–25
Silva AC, Vens EA, Hara AK, Fletcher JG, Fidler JL, Johnson CD (2006) Evaluation of benign and malignant rectal lesions with CT colonography and endoscopic correlation. Radiographics 26(4):1085–1099
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Mang, T., Böhm, G., Schima, W. (2013). Normal Colon. In: Neri, E., Faggioni, L., Bartolozzi, C. (eds) CT Colonography Atlas. Medical Radiology(). Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-11149-5_1
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DOI: https://doi.org/10.1007/978-3-642-11149-5_1
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