fig17

Figure 17. JNA. (A) Axial (left) and coronal (right) non-contrast CT images, and (B) coronal T2-weighted (left) and post-contrast T1-weighted (right) MRI images, demonstrate an expansile, hyperenhancing mass arising from the left PPF and extending into the left nasal cavity (arrows). JNA: Juvenile nasopharyngeal angiofibroma; CT: computed tomography; MRI: magnetic resonance imaging; PPF: pterygopalatine fossa.