Our patient’s tumor-a low-grade, 0.7-cm well-differentiated NET confined to the submucosa (pT1a), with a mitotic index of <1 per 2 mm2, a Ki-67 proliferation index <1%, and no lymphovascular or perineural invasion-was completely resected via endoscopic mucosal resection with negative margins. The gene discussed is MKI67; the disease is neoplasm.