Stage III Unknown Primary Tumor (Except for EBV-Related and HPV-Related Tumors) and Metastatic Cervical Adenopathy AJCC v8

**Semantic type:** Neoplastic Process

**Definition:** Stage III includes: T0, N1, M0. T0: No evidence of primary tumor. N1: Metastasis in a single ipsilateral lymph node, 3 cm or smaller in greatest dimension and ENE (extranodal extension)(-). M0: No distant metastasis. (AJCC 8th Ed.)