A perianal skin-coloured verrucous plaque in a 35-year-old female
References
O’Toole EA, Ponten F, Lundeberg J, Asplund A. Principles of Tumor biology and pathogenesis of BCCs and SCCs. In: Bolognia JL, Jorizzo JL, Schaffer JV, eds Dermatology, 3rdedn. Philadelphia: Elsevier Saunders; 2012. P.1769-70.
Shehan J, Wang JF, Repertinger S, Sarma DP. Perianal squamous cell carcinoma in-situ: a report of two human papilloma virus-negative cases. Cases J. 2008;1;114.
Soyer HP, Rigel DS, Wurm EMT. Actinic keratosis, basal cell carcinoma and squamous cell carcinoma. In: Bolognia JL, Jorizzo JL, Schaffer JV, eds Dermatology, 3rdedn. Philadelphia: Elsevier Saunders; 2012. P.1773-81.
Daling JR, Madelein MM, Jhosson LG et al. Human papillomavirus, smoking and sexual practices in the aetiology of anal cancer. Cancer. 2004;101:720-280.
Greene FL, Page DL, Fleming ID, eds. Anal canal. AJCC Cancer Staging Manual. New York: Springer; 2002. P.125-30.
Phillip Fleshner PR, Chalasani S, Chang GJ et al. Practice parameters for anal squamous neoplasm. Dis Colon Rectum. 2008;51:2-9.