" /> Perianal Intraepithelial Neoplasia - CISMeF





Preferred Label : Perianal Intraepithelial Neoplasia;

NCIt synonyms : Anal Margin Squamous Dysplasia; Perianal Skin Bowen's Disease; PSIN; Anal Margin Bowen Disease; Bowen Disease; Anal Margin Intraepithelial Neoplasia; Perianal Squamous Dysplasia; Anal Margin Bowen's Disease; Perianal Skin Bowen Disease; Perianal Squamous Intraepithelial Neoplasia;

CISMeF acronym : PSIN;

NCIt definition : A precancerous neoplastic intraepithelial process involving the squamous epithelium of the perianal skin. Clinically, it usually presents as a white or red area in the perianal skin. Morphologically, it is characterized by full thickness dysplasia of the squamous epithelium and sometimes of the pilosebaceous epithelium. Human papillomavirus DNA sometimes may be identified in the dysplastic epithelium. It may recur after treatment, however only a small percentage of cases progress to squamous cell carcinoma.;

Neoplastic status : Undetermined;

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31/07/2025


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