NCIt related terms : Stage 0 Digestive System Neuroendocrine Tumor;
NCIt definition : Stage 0 includes: Tis, N0, M0. Tis (applies only to stomach): Carcinoma in situ/dysplasia
(tumor size less than 0.5 mm), confined to mucosa. N0: No regional lymph node metastasis.
M0: No distant metastasis. (AJCC 7th ed.);