Three-Year Experience of Treating Recurrent Respiratory Papilloma with Interferon

Abstract

This paper presents the 3-year follow-up of the original 19 patients with recurrent respiratory papilloma treated with exogenous alpha human leukocyte interferon (α-IFN) at the University of Iowa. Two patients were dropped from the study because of poor patient compliance, and one was lost to follow-up. After approximately 1 year of α-IFN treatment, five patients were clear, and the rest continued to have disease: Seven mild, two moderate, and two severe. A second course of α-IFN was administered to eight patients, all of whom had a decrease in the volume of the papilloma. The reduction in anatomic distribution was variable. During the observation period all patients either cleared (50%), improved (25%), or continued with severe disease (25%). In summary, the response of recurrent respiratory papilloma to α-IFN therapy is dramatic in some patients and slight in others.