Unknown Primary Tumor pN2 TNM Finding v8

**Semantic type:** Finding

**Definition:** Unknown primary tumor with metastasis in a single ipsilateral or contralateral cervical lymph node 3 cm or smaller in greatest dimension and ENE(+); or metastasis in a single ipsilateral cervical lymph node larger than 3 cm but not larger than 6 cm in greatest dimension and ENE(-); or metastases in multiple ipsilateral cervical lymph nodes, none larger than 6 cm in greatest dimension and ENE(-); or metastases in bilateral or contralateral cervical lymph nodes, none larger than 6 cm in greatest dimension and ENE(-). ENE detected on histopathologic examination is designated as ENEmi (microscopic ENE equal or less than 2 mm) or ENEma (major ENE more than 2 mm). (from AJCC 8th Ed.)