Stage I Ampulla of Vater Neuroendocrine Tumor AJCC v8

**Semantic type:** Neoplastic Process

**Definition:** Stage I includes: T1, N0, M0. T1: Tumor measuring 1 cm or less and is confined within the sphincter of Oddi. N0: No regional lymph node metastasis. M0: No distant metastasis. (AJCC 8th ed.)

**Synonyms:** - Stage I Ampulla of Vater Neuroendocrine Tumor