Juvenile Nasal Angiofibroma
These tumors tend to be seen in teenage males and usually originate along
the pterygopalatine fossa. They are extremely vascular and can follow blood
vessels commonly out to the infratemporal fossa, orbit, and possibly also
into the middle cranial fossa. They can represent with nasal obstruction
and epistasis. One should check for numerous flow voids and widening of
the pterytopalatine foramen.
* Teenage males.
* Epistaxes and/or nasal obstruction.
* Arises from pterygopalatine fossa with frequent destruction of pterygoid plates.
* Extremely vascular: Check for flow voids on MRI. Do not biopsy unless the tumor has been embolized.
* May spread to infratemporal fossa, orbit, skull base.
* Low grade malignancy.
* Usually slow growing, relentless, and recurrent.
* Destroys adjacent architecture by direct invasion.