Angiofibroma can be diagnosed using CT, MR imaging andangiography. CT is a most important pre-operative test because it is usefulfor showing the destruction of bony structures and widening of foramenand fissures at the skull base due to spread of tumor. CT can also helprecognize invasion of sphenoid and thus determine the aggressiveness ofsurgery. On CT, bone involvement and tumoral spread can be seen best onthin-section axial or coronal images. MRI is useful to show presence ofintracranial extension of the tumor. MRI also helps discern between sinusinvasion, obstruction and retention of secretions. On MR imaging, JNAappears as a heterogenous mass with signal voids (representinghypertrophic tumor vessels) that are consistent with the highly vasculartumor; intense enhancement with gadopentetate contrast material is typical.