C21 — Malignant neoplasm of anus and anal canal

Excludes2

malignant carcinoid tumors of the colon ( C7A.02- )

Excludes2

malignant melanoma of anal margin ( C43.51 )

Excludes2

malignant melanoma of anal skin ( C43.51 )

Excludes2

malignant melanoma of perianal skin ( C43.51 )

Excludes2

other and unspecified malignant neoplasm of anal margin ( C44.500 , C44.510 , C44.520 , C44.590 )

Excludes2

other and unspecified malignant neoplasm of anal skin ( C44.500 , C44.510 , C44.520 , C44.590 )

Excludes2

other and unspecified malignant neoplasm of perianal skin ( C44.500 , C44.510 , C44.520 , C44.590 )