Fig. 2

Postcontrast MR images of a 66-year-old-man with NK/T-cell lymphoma who presented with facial numbness (patient 18). a Coronal image shows a mass in the left side of the face and nasal cavity (large arrows) with infiltration of the orbit including the extra-ocular muscles (small arrows). b Axial image shows the orbital mass (large black arrow) and extension through the inferior orbit fissure to the pterygopalatine fossa (small black arrow). Involvement of the mandibular nerve (V3) is also present (white arrow). c Axial images shows involvement of the cavernous sinus (large black arrow) and Meckel’s cave (small black arrow). There is spread via the superficial petrosal nerve (white arrow) to the facial nerve (not shown)