APOC1 and neoplasm: As shown in the bar plot (Figure 5I), APOC1 exhibited a strong positive correlation with several critical signaling pathways involved in immune regulation and cellular processes, including cell adhesion molecules (CAMs), antigen processing and presentation, natural killer cell-mediated cytotoxicity, cytokine-cytokine receptor interaction, chemokine signaling pathway, and the NF-kappa B signaling pathway, suggesting that APOC1 may play a role in tumor initiation, progression, and metastasis by modulating immune responses and cellular processes within the tumor microenvironment.