Anal cancer
Tumour (T) describes the size of the cancer. Node (N) says if it has spread to nearby lymph nodes. And metastasis (M) says if it has spread elsewhere in the body.
The cancer's size and how far it has spread are described as a number between 1 and 4. Anal intraepithelial neoplasia (AIN) may be called stage 0.
The type of anal cancer depends on the sort of cell the cancer started in. Squamous cell carcinoma (SCC) is the most common type. Others include adenocarcinoma and melanoma.
Last reviewed: 15 Aug 2025
Next review due: 15 Aug 2028
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