Excludes
- Malignant carcinoid tumors of the colon (C7A.02-)
- Malignant melanoma of anal margin (C43.51)
- Malignant melanoma of anal skin (C43.51)
- Malignant melanoma of perianal skin (C43.51)
- Other and unspecified malignant neoplasm of anal margin (C44.500-C44.510-C44.520-C44.590)
- Other and unspecified malignant neoplasm of anal skin (C44.500-C44.510-C44.520-C44.590)
- Other and unspecified malignant neoplasm of perianal skin (C44.500-C44.510-C44.520-C44.590)
- C21
- C21.0
- C21.1
- C21.2
- C21.8
| Malignant neoplasm of anus and anal canal |
| Malignant neoplasm of anus, unspecified |
| Malignant neoplasm of anal canal |
| Malignant neoplasm of cloacogenic zone |
| Malignant neoplasm of overlapping sites of rectum, anus and anal canal |