Immunohistochemical staining in Barrett’s metaplasia, HGIN, and adenocarcinoma of embedded specimens for WNT3A revealed a significant higher staining intensity of WNT3A positive cells in squamous epithelium (SQ) compared to intestinal metaplasia, HGIN and adenocarcinoma cells (Fig. 7a). The gene discussed is WNT3A; the disease is Barrett esophagus.