Immunohistochemical testing of p53, WT-1, and MUC16 in the organoids, the routine marker in diagnosing OC, exhibited striking concordance with tissue expression, (Figure 8B, Scale bar for tissue = 70 μm, scale bar for organoid = 40 μm), affirming the homology between the organoids and the corresponding tumor tissue. The gene discussed is WT1; the disease is neoplasm.