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An analysis of distant metastases from squamous cell carcinoma of the upper respiratory and digestive tracts.

The charts of 5,019 previously untreated patients with squamous cell carcinoma of the upper respiratory and digestive tracts who completed treatment for cure from January 1948 through August 1973, were reviewed. These patients had no evidence of distant metastases when initially evaluated. Five hundred and forty-six patients developed clinical evidence of distant metastases. The overall incidence of distant metastases was 10.9%, varying from 3.1% for vocal cord cancers to 28.1% for cancer of the nasopharynx. The lungs and bones were the most common first sites of metastases, accounting for 52%