There is generalized mucoperiosteal thickening in the nasal cavity.

There is focal area of mucoperiosteal thickening or a destructive, ulcerative or necrotic abnormality of the nasal septum, turbinates or lateral walls of the nasal cavity.

There is infiltration of the fat surrounding the nasolacrimal sac.

There is soft tissue infiltration or bone erosion along the nasolacrimal fossa or canal.

There is infiltration in the posterior nasal cavity or sphenoethmoidal recess that is near to or protruding into the sphenopalatine foramen and pterygopalatine fossa.

There is evidence of bone erosion along the face of the sphenoid bone or pterygoid base or processes.

There is mucoperiosteal thickening in the sinuses.

There is evidence of bone erosion especially at the junction of the lacrimal and ethmoid bones and/or along the face of the sphenoid sinus.

The fat planes in the canine fossa deep to the SMAS are infiltrated.

The extraconal orbital fat surrounding the infraorbital vascular bundle is infiltrated. 

The orbital apex and the superior and inferior orbital fissures are infiltrated. 

The fat pads posterior to the maxillary sinus and within the pterygopalatine fossa are infiltrated.

There is a deeply infiltrating, necrotic or ulcerative process of the nasopharynx.

There is evidence of inflammatory changes within the parapharyngeal fat of the nasopharynx.

The visualized portions of the brain are abnormal for the patient’s age.