A previous paper focused on the relationship between LAT1/Cd98hc expression and 18F-DOPA uptake, demonstrating a conflicting association between LAT1 protein expression and 18F-DOPA-PET uptake in a mixed population of Pheo and paraganglioma cases, carrying SDHx mutations, speculating a possible role of other LAT family transporters, such as LAT4 [23]. The gene discussed is SLC7A5; the disease is paraganglioma.