Unknown Primary Tumor pN3b TNM Finding v8

**Semantic type:** Finding

**Definition:** Unknown primary tumor with metastases in a single ipsilateral cervical lymph node larger than 3 cm in greatest dimension and ENE(+); or metastases in multiple ipsilateral, contralateral, or bilateral cervical lymph nodes, any size and ENE(+) in any node. (from AJCC 8th Ed.)