TACSTD2 and neoplasm: The level of TROP2 gene expression in the organoids obtained from tumor tissue differed markedly from patient to patient, and an enhanced stimulation of the Wnt pathway had no effect on this expression, as confirmed by the immunofluorescence detection of TROP2 in the tumor organoids cultured in an ENR medium without the addition and with the addition of the WntSur ligand.