3. De Vuyst H, Clifford GM, Nascimento MC, Madeleine MM, Franceschi S. Prevalence and type distribution of human papillomavirus in carcinoma and intraepithelial neoplasia of the vulva, vagina and anus: a meta-analysis. Int J Cancer 2009;124:1626–36.
4. Machalek DA, Poynten M, Jin F, Fairley CK, Farnsworth A, Garland SM, et al. Anal human papillomavirus infection and associated neoplastic lesions in men who have sex with men: a systematic review and meta-analysis. Lancet Oncol 2012;13:487–500.
5. Daling JR, Madeleine MM, Johnson LG, Schwartz SM, Shera KA, Wurscher MA, et al. Human papillomavirus, smoking, and sexual practices in the etiology of anal cancer. Cancer 2004;101:270–80.
6. Berry JM, Jay N, Cranston RD, Darragh TM, Holly EA, Welton ML, et al. Progression of anal high-grade squamous intraepithelial lesions to invasive anal cancer among HIV-infected men who have sex with men. Int J Cancer 2014;134:1147–55.
8. Adams R. Surveillance of anal canal cancers. Surg Oncol Clin N Am 2017;26:127–32.
10. Ederer F, Heise H. Instructions to IBM 650 programmers in processing survival computations. Methodological note No. 10. End Results Evaluation Section. Bethesda (MD), National Cancer Institute; 1959.
11. Paul W Dickman [Internet]. Stockholm (Sweden), Karolinska Institutet; [2012 Dec 7]. Available from:
http//www.pauldickman.com
15. Tseng HF, Morgenstern H, Mack TM, Peters RK. Risk factors for anal cancer: results of a population-based case--control study. Cancer Causes Control 2003;14:837–46.
16. Pernot S, Terme M, Zaanan A, Tartour E, Weiss L, Taieb J. Immunity and squamous cell carcinoma of the anus: epidemiological, clinical and therapeutic aspects. Clin Res Hepatol Gastroenterol 2014;38:18–23.
18. Soeberg MJ, Rogers K, Currow DC, Young JM. Trends in incidence and survival for anal cancer in New South Wales, Australia, 1972-2009. Cancer Epidemiol 2015;39:842–7.
19. Ajani JA, Winter KA, Gunderson LL, Pedersen J, Benson AB 3rd, Thomas CR Jr, et al. Fluorouracil, mitomycin, and radiotherapy vs fluorouracil, cisplatin, and radiotherapy for carcinoma of the anal canal: a randomized controlled trial. JAMA 2008;299:1914–21.
20. Kachnic LA, Tsai HK, Coen JJ, Blaszkowsky LS, Hartshorn K, Kwak EL, et al. Dose-painted intensity-modulated radiation therapy for anal cancer: a multi-institutional report of acute toxicity and response to therapy. Int J Radiat Oncol Biol Phys 2012;82:153–8.
21. James RD, Glynne-Jones R, Meadows HM, Cunningham D, Myint AS, Saunders MP, et al. Mitomycin or cisplatin chemoradiation with or without maintenance chemotherapy for treatment of squamous-cell carcinoma of the anus (ACT II): a randomised, phase 3, open-label, 2 × 2 factorial trial. Lancet Oncol 2013;14:516–24.
23. Ogawa H, Haneda S, Shibata C, Miura K, Nagao M, Ohnuma S, et al. Adenocarcinoma associated with perianal fistulas in Crohn’s disease. Anticancer Res 2013;33:685–9.
24. Nilsson PJ, Ragnarsson-Olding BK. Importance of clear resection margins in anorectal malignant melanoma. Br J Surg 2010;97:98–103.
25. Meguerditchian AN, Meterissian SH, Dunn KB. Anorectal melanoma: diagnosis and treatment. Dis Colon Rectum 2011;4:638–44.
29. Bentzen AG, Guren MG, Wanderås EH, Frykholm G, Tveit KM, Wilsgaard T, et al. Chemoradiotherapy of anal carcinoma: survival and recurrence in an unselected national cohort. Int J Radiat Oncol Biol Phys 2012;83:e173. –e180.