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Anal and perianal squamous carcinomas and high‐grade intraepithelial lesions exclusively associated with “low‐risk” HPV genotypes 6 and 11
Author(s) -
Cornall Alyssa M.,
Roberts Jennifer M.,
Garland Suzanne M.,
Hillman Richard J.,
Grulich Andrew E.,
Tabrizi Sepehr N.
Publication year - 2013
Publication title -
international journal of cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.475
H-Index - 234
eISSN - 1097-0215
pISSN - 0020-7136
DOI - 10.1002/ijc.28228
Subject(s) - anal canal , anal cancer , cervix , medicine , genotype , pathology , anus , anal carcinoma , lesion , hpv infection , basal cell , squamous intraepithelial lesion , intraepithelial neoplasia , cervical cancer , cancer , biology , cervical intraepithelial neoplasia , prostate cancer , rectum , gene , biochemistry , surgery
Anal squamous cell carcinomas are predominantly associated with high‐risk human papillomaviruses (HPVs), particularly HPV 16, similar to cervical, vaginal and vulvar cancers. Although the presence of “low‐risk” HPVs, in particular genotypes 6 and 11, have occasionally been reported in various HPV‐related anogenital cancers, the overall distribution of these genotypes in the anal canal and perianal tissue may differ to that in the cervix. In addition, although the majority of anal and perianal cancers are associated with HPV, some are not; hence, confirmation of direct association of the virus within a lesion is important. Using laser capture microdissection, anal and perianal invasive carcinomas and high‐grade squamous intraepithelial lesions (HSILs) in biopsies previously associated with HPV 6 or 11 alone were isolated from tissue sections and HPV genotype tested. Of seven cases tested, four invasive carcinomas were positive for HPV 6 only, one invasive carcinoma was negative for HPV and two HSILs were positive for HPV 11 only. All samples were confirmed as HPV 16/18 negative using two different DNA targets (E6 and L1). From these results, we confirm that HPV 6 and 11 can occasionally be associated with high‐grade lesion and anal cancer.