PLIN1 and neoplasm: When comparing expressions of lipid metabolism—related proteins among molecular subtypes, the expression of PLIN1 (p < 0.001), FABP4 (p = 0.029), CPT-1A (p = 0.001), ACOX-1 (p < 0.001), and FASN (p < 0.001) differed significantly among the different tumor subtypes.