Includes:

  • malignant neoplasm of middle ear

Excludes1

  • mesothelioma (C45.-)
  1. C31 Malignant neoplasm of accessory sinuses

    1. C31.0 Malignant neoplasm of maxillary sinus

      Inclusion term(s):

      • Malignant neoplasm of antrum (Highmore) (maxillary)
    2. C31.1 Malignant neoplasm of ethmoidal sinus

    3. C31.2 Malignant neoplasm of frontal sinus

    4. C31.3 Malignant neoplasm of sphenoid sinus

    5. C31.8 Malignant neoplasm of overlapping sites of accessory sinuses

    6. C31.9 Malignant neoplasm of accessory sinus, unspecified

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.