Notably, some of the latter subtypes, such as MZLs, SLL/CLL, and LPL, are known to show a variable FDG avidity, and as a consequence, the Lugano guidelines generally do not recommended the use of [18F]FDG-PET/CT or -PET/MRI in those subtypes, but instead, recommend CE-CT [8]. This evidence concerns the gene LPL and B-cell chronic lymphocytic leukemia.