Fig. 2.

Imaging features of NAF. a Coronal CT image without contrast media of a 14 y.o.m. patient showing a large tumor occupying nasal cavity and extending into the orbit, infratemporal fossa and facial soft tissues. b MRI in T1 with enhancement of a 14 y.o.m. patient showing a tumor with complete occupation of sphenoidal sinus with extension into pterygopalatine fossa, and infratemporal fossa. c CT scan Coronal projection of a 16 y.o.m. shows hypodense tumor located in roof of right pterygoid plate (implantation area), secondary involvement of sphenoidal sinus and important occupation of posterior nasal cavity. d CT scan in a sagittal plane of same patient of figure c showing NAF located in posterior nasal cavity with extension to the sphenoidal sinus and nasopharynx. e Coronal CT scan showing complete unilateral occlusion of the right nasal cavity with partial involvement to sphenoidal sinus. f MRI in T1 with enhancement of a 14 y.o.m. patient, presenting complete occupation of anterior nasal cavity and extension to ethmoidal cavity causing nasal septal deviation. Tumor displays central hypodensity