PPARA and small cell lung carcinoma: In the F0 vs F35 groups, the predictions of common KEGG pathways based on transcriptomic and metabolomic were “biosynthesis of unsaturated fatty acids”, “alpha-linolenic acid metabolism”, “small cell lung cancer”, “fatty acid biosynthesis”, “PPAR signaling pathway”, “linoleic acid metabolism”, “arachidonic acid metabolism”, “inflammatory mediator regulation of TRP channels”, and “glycerophospholipid metabolism” (Figure 10B).