1. Boyle P, Levin B . World Cancer Report 2008. IARC: Lyon, France, 2008.
2. Ferlay J, Shin H-R, Bray F et al. Globocan 2008: Cancer Incidence and Mortality Worldwide. IARC: Lyon, France, 2010, IARC CancerBase No. 10 1027–5614.
3. Edge SB, Byrd DR, Compton CC et al. Colon and rectum. AJCC Cancer Staging Manual 7th edn Springer-Verlag: New York, NY, 2010;143–164.
4. Puppa G, Sonzogni A, Colombari R et al. TNM staging system of colorectal carcinoma: a critical appraisal of challenging issues. Arch Pathol Lab Med 2010;134:837–852.
5. Shia J, Klimstra DS, Bagci P et al. TNM staging of colorectal carcinoma: issues and caveats. Semin Diagn Pathol 2012;29:142–153.