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C31

Malignant neoplasm of accessory sinuses

C31.0

Malignant neoplasm of maxillary sinus

• Malignant neoplasm of antrum (Highmore) (maxillary)

C31.1

Malignant neoplasm of ethmoidal sinus

C31.2

Malignant neoplasm of frontal sinus

C31.3

Malignant neoplasm of sphenoid sinus

C31.8

Malignant neoplasm of overlapping sites of accessory sinuses

C31.9

Malignant neoplasm of accessory sinus, unspecified