LAMC2 and infantile convulsions and choreoathetosis: To investigate the molecular mechanism of LAMC2 in iCCA oncogenesis, Gene Set Enrichment Analysis (GSEA) was performed in iCCA tumors from Cohorts 1 and 5 (with >90 iCCAs in both cohorts) between the LAMC2‐high group and the LAMC2‐low group based on the median‐LAMC2 cut‐off (Figure 3A).