YAP1 and adrenal cortex neoplasm: Immunofluorescence reveals overexpressed YAP1 both in the adrenocortical tumors (ACTs) of children, as well as in the cytoplasm and nucleus of fetal adrenal cells, while diminished expression of YAP1 is observed in the postnatal adrenal cortex, pointing to the potential involvement of YAP1 in promoting tissue dedifferentiation and proliferation (19).