FASN and neoplasm: For instance, in uveal melanoma, enzymes involved in fatty acid synthesis, such as Fatty Acid Synthase (FASN), and in fatty acid oxidation, like Acyl-CoA Dehydrogenase (ACAD), are upregulated, supporting enhanced lipid metabolism and providing energy to the rapidly proliferating tumor cells (Han et al., 2023; Ma et al., 2021).