WHO classification of anal canal tumors

The World Health Organization classifies anal canal neoplasms into intraepithelial neoplasms and invasive neoplasms which are further divided to epithelial and non-epithelial tumors and secondary lesions:

Epithelial tumors
Non-epithelial tumors
Carcinoid tumors
Secondary tumors
  • direct extension from adjacent organs: rectal, cervical, and prostate carcinomas

See also


Article information

rID: 50205
Synonyms or Alternate Spellings:
  • WHO classification of anal canal tumors
  • Anal canal tumors: WHO classificaion
  • Anal canal tumours: WHO classificaion

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