Consistent with the outcomes of BI, fluorescent imaging revealed the strongest signal of epifluorescence in the intraperitoneal cavity and the viscera (spleen, stomach, intestine, liver, lung, etc.)of the Yap1−/− mice compared with the WT and Yap1+/− mice, indicating that the intraperitoneal microenvironment of Yap1−/− mice facilitated a higher tumor formation ability and metastatic potential of OvCa cells (Fig. 5E). The gene discussed is YAP1; the disease is neoplasm.