Fig. 1

A 50-year-old female who is status post excision of left nasolabial melanoma,presenting with left perioral numbness. Sagittal unfused (a) and fused (b) FDG PET/CT shows alongitudinal hypermetabolic mass extending retrogradely along the expected course of theinfraorbital branch Of V2 in the orbital floor, with intracranial extension (arrow). Sagittal (c), axial (d) curved Multiplanar reformatted images (MPR) of fat suppressed post contrast T1 WI MRI confirming retrograde perineural metastatic melanoma, along the infraorbital branch of V2 (red arrow), through the foramen rotundum (asterix), into the cavernous sinus (blue arrow), to the cisternal portion of the left trigeminal nerve (green arrow)