Figure 31: MRI criteria of perineural tumor spread. 62-year-old patient with histologically proven carcinoma of the anterior ethmoid cells and new onset of facial pain on the right side.
a) Coronal T1w images with loss of fat signal (white arrow) of the oval foramen in comparison to contralateral side (black arrow).
b) Hyperintense signal on T2w images with fat suppression of the oval foramen (arrow) in comparison to contralateral side (dotted arrow).
c) Avid enhancement within the oval foramen on the right side (arrow), which is widened compared to the contralateral side.