C31 Malignant neoplasm of accessory sinuses ( Search )
- C310 Malignant neoplasm: Maxillary sinus ( Search )
- C311 Malignant neoplasm: Ethmoidal sinus ( Search )
- C312 Malignant neoplasm: Frontal sinus ( Search )
- C313 Malignant neoplasm: Sphenoidal sinus ( Search )
- C318 Malignant neoplasm: Overlapping lesion of accessory sinuses ( Search )
- C319 "Malignant neoplasm: Accessory sinus, unspecified" ( Search )
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