In a study by Zhu et al., GCC expressed markers for both squamous cell carcinoma (p63 and CK34βE12) and adenocarcinoma (CAM5.2, MUC1, MUC2 and CEA) while the Ki-67 proliferation index was high (≥70%) [7]. The gene discussed is MUC1; the disease is goblet cell carcinoma.