Management of squamous cell carcinoma of unknown origin in cervical lymph nodes.

Forty-three patients with the diagnosis of metastatic squamous cell carcinoma from unknown primary to the cervical lymph nodes were treated in EOVAMC between 1962-1982. Six of these patients were N1, 19 N2, and 18 N3. Five-year survival was 41 per cent for N1, 15 per cent for N2, and 6 per cent for N3 nodes. There was no significant difference in the treatment failure of those patients treated with unimodality versus multimodality. A subsequent primary was detected in the head and neck in 23 per cent of these patients (10/43), and eight of these patients had received previous radiotherapy. The most common site for these subsequent primaries was hypopharynx. Nine of the 43 patients developed distant metastasis with no correlation to stage of disease or treatment modality. These data show that the survival of these patients correlates with the stage of nodal disease, and that radiotherapy did not decrease the subsequent appearance of the primary lesions.