2E64.2

ICD-11 MMS 2026-01

Carcinoma in situ of anal margin or perianal skin

Description

Carcinoma in situ of anal margin or perianal skin is most commonly squamous and related to oncogenic HPV strains, HIV infection or both. It may present as warty pigmented patches (Bowenoid papulosis).

Index terms

  • Carcinoma in situ of anal margin or perianal skin
  • Perianal intraepithelial neoplasia, high grade
  • Bowenoid papulosis of perianal skin
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  • High grade squamous intraepithelial lesion of anal margin or perianal skin

Exclusions from above levels

  • 2E63 – Melanoma in situ neoplasms

Sibling codes

  • 2E64.0 – Intraepidermal squamous cell carcinoma
  • 2E64.1 – Extramammary Paget disease of skin
  • 2E64.Y – Other specified carcinoma in situ of skin
  • 2E64.Z – Carcinoma in situ of skin, unspecified

Foundation entity

Carcinoma in situ of anal margin or perianal skin – http://id.who.int/icd/entity/1015982132

Allowed postcoordination axes

Part of: 2E64: Carcinoma in situ of skin › 02: Neoplasms