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The terminology has been adopted by the American Joint Committee on Cancer, separating the anal region into the anal canal, the perianal region and the skin. This paper describes the gross anatomy of the anal canal, along with its associated blood supply, venous and lymphatic drainage, and nerve supply. The new terminology referred to in this article may assist clinicians and health care providers to identify lesions more precisely through naked eye observation and without the need for instrumentation. Knowledge of the regional anatomy of the anus will also assist in management decisions.<\/jats:p>","DOI":"10.1071\/sh12034","type":"journal-article","created":{"date-parts":[[2012,11,26]],"date-time":"2012-11-26T23:20:10Z","timestamp":1353972010000},"page":"513-516","source":"Crossref","is-referenced-by-count":11,"title":["Anal anatomy and normal histology"],"prefix":"10.1071","volume":"9","author":[{"given":"Priti","family":"Pandey","sequence":"first","affiliation":[{"name":"ADepartment of Anatomy, School of Medical Sciences, Faculty of Medicine, University of NSW, Sydney, NSW 2052, Australia. 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Anal tumors. American Society of Colon and Rectal Surgeons; 2008. 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