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%
there is a large left sided nasal mass involving both ethmoid sinuses and left maxillary sinus.
there is destruction of the cribriform plate with intracranial component that displays peripheral cysts
the tumor is not seen seperately from the grey matter suggesting invasion.