Phase II study of 13-cis-retinoic acid and interferon-α2a in patients with advanced squamous cell lung cancer

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Abstract
The combination of interferon (IFN)-alpha 2a and 13-cis-retinoic acid (13-cRA) has demonstrated significant antitumor activity in patients with advanced squamous cell cancer of the skin and cervix. We performed a prospective phase II trial of this combination in patients with locally advanced or metastatic squamous cell lung cancer. Twenty-one patients were enrolled on the study. All patients were evaluable for toxicity and 17 were evaluable for response, four with locally advanced and 13 with metastatic disease. One partial response was obtained in a patient with locally advanced disease. Toxicity consisted mainly of constitutional side effects (fatigue, anorexia), which resulted in eight patients coming off-study. The combination of IFN-alpha 2a and 13-cRA is unlikely to exhibit significant clinical activity in patients with metastatic squamous cell lung cancer, but activity in patients with locally advanced disease has not been excluded.

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