Of the 29 junctional adenocarcinomas analysed by Flucke et al., relative frequency of immunoreactivity for MUC1 was the highest compared to MUC2 and MUC5AC, indicating that of all the GOJ tumours staining positively, the MUC1 gene was expressed the most prominently in tumour tissue [23]. The gene discussed is MUC2; the disease is neoplasm.