Excludes1

  • Kaposi's sarcoma of gastrointestinal sites (C46.4)

Excludes2

  • gastrointestinal stromal tumors (C49.A-)
  1. C21 Malignant neoplasm of anus and anal canal

    Excludes2

    1. C21.0 Malignant neoplasm of anus, unspecified

    2. C21.1 Malignant neoplasm of anal canal

      Inclusion term(s):

      • Malignant neoplasm of anal sphincter
    3. C21.2 Malignant neoplasm of cloacogenic zone

    4. C21.8 Malignant neoplasm of overlapping sites of rectum, anus and anal canal

      Inclusion term(s):

      • Malignant neoplasm of anorectal junction
      • Malignant neoplasm of anorectum
      • Primary malignant neoplasm of two or more contiguous sites of rectum, anus and anal canal
Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.