C31.8

Overlapping lesion of accessory sinuses

Coding guidance (WHO 2019)

[See note 5 at the beginning of this chapter]

Sibling codes

C31Malignant neoplasm of accessory sinuses C31.0Maxillary sinus C31.1Ethmoidal sinus C31.2Frontal sinus C31.3Sphenoidal sinus C31.9Accessory sinus, unspecified