WHO classification of anal canal tumors

WHO Klassifikation der Tumoren des Analkanals
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

• squamous cell carcinoma of anal canal
• adenocarcinoma of anal canal
• mucinous adenocarcinoma of anal canal
• small cell carcinoma of anal canal
• undifferentiated carcinoma of anal canal

Non-epithelial tumors

• leiomyoma of anal canal
• gastrointestinal stromal tumor of anal canal
• myofibroma of anal canal

Carcinoid tumors

• carcinoid tumor of anal canal

Melanoma 

• melanoma of anal canal

Secondary tumors

• direct extension from adjacent organs: rectal, cervical, and prostate carcinomas

See also

• anal margin neoplasms

Siehe auch:

• Analkarzinom