What is the characteristic finding in these images?
Presence of cysts at the periphery of the intracranial component are highly suggestive of this diagnosis.
What is the staging system used for this tumor?
the Kadish staging system is used clinically: Stage A- tumor limited to nasal cavity- 5 yr survival 75% stage B- tumor involving 1 or more paranasal sinuses- 5 yr survival 68% Stage C- extending beyond nasal cavity- 5 yr survival 41.2%
A large left sided nasal mass involving both ethmoid sinuses and left maxillary sinus.
Destruction of the cribriform plate with intracranial component that displays peripheral cysts.
The tumor is not seen seperately from the grey matter suggesting invasion.