Abstract
Between 2002 and 2011, we treated 18 cases of cervical lymph node metastasis from cancer of unknown primary origin. The subjects were 15 men and 3 women, ranging in age from 45 to 83 years (mean: 65.5 years). The histopathological tumor types were squamous cell carcinoma (15 cases), mucoepidermoid carcinoma (1 case), adenocarcinoma (1 case), and undifferentiated carcinoma (1 case). The largest metastatic lymph nodes were located in the upper deep cervical region in 16 cases. For histologic diagnosis of the metastatic lymph nodes, FNAB (fine needle aspiration biopsy) was conducted in 14 cases and open biopsy in 4 cases. Neck dissection was performed in 17 cases, of which 14 also received postoperative radiotherapy. The overall 5-year survival rate in this study was 63.6%. For the control of metastatic lymph nodes and minute tumors at the primary site, combination therapy consisting of neck dissection and chemoradiotherapy is desirable.
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