The differential genes were involved in multiple pathways including small cell lung cancer, p53 signaling pathway, pancreatic cancer, colorectal cancer, FoxO signaling pathway, lysosome, cell cycle, apoptosis, endocytosis, cellular senescence, and proteoglycans in cancer, revealed by KEGG analysis (Figure 2E). The gene discussed is TP53; the disease is familial pancreatic carcinoma.