PPARA and cancer: Through gene set enrichment analysis, it was found that M1 was mainly enriched by metabolic pathways and PPAR signaling, which were mainly expressed in the C1 and C2 groups; M2 and M4 were mainly enriched by the inflammation-related pathways, and the specific pathway of M3 was proteoglycans in cancer, and M2, M3, and M4 were mainly expressed in the C1 and C3 groups.