CNV co-occurrence profiles of POC1A in STAD. (A–B) POC1A deletion was significantly correlated with low POC1A expression (Spearman: r=0.23, p=8.129e-6; Pearson: r=0.29, p=8.53e-9), which indicated that POC1A deletion may act as a significant pathogenic factor. (C–D) GO and KEGG analysis of POC1A co-occurrence genes (p<0.05).