GPC3 and hepatoblastoma: Clusters 0, 2, and 4, characterized by high expression of known hepatoblastoma markers, including AFP, DLK1, and GPC3, were shared among all the tumoroids, while the remaining clusters of cells were more heterogeneously represented across the different tumoroids (Fig. 5a-c, Supplementary Fig. S7a-c, Supplementary Data 4).