Abstract
Surgery is the main treatment for extra-abdominal desmoid tumors, but the results of further management remain uncertain. Therefore, a retrospective analysis was undertaken to evaluate the toxicity and efficacy of treatment with interferon-alpha (IFN-alpha) +/- tretinoin in this setting. Thirteen patients with extra-abdominal desmoid tumors and a median age of 32 years (range, 15-73) received IFN-alpha. Seven of these patients received a combination of IFN-alpha and tretinoin in order to test further enhancement. After a mean observation period of 27 +/- 15 months (mean +/- standard deviation) under treatment with IFN-alpha +/- tretinoin, local control was seen in 11 of 13 patients (85%). Seven patients had no evidence of disease at a mean disease-free interval of 22 +/- 18 months; in two patients progressive disease occurred after only 7 and 9 months, respectively, of observation. In another four patients, progression of the desmoid tumor was stabilized. The data of this retrospective, nonrandomized study on therapy with IFN-alpha +/- tretinoin suggest that such treatment may be effective in prolonging the disease-free interval of patients after intralesional or marginal surgery. Because of the encouraging response rate, this regimen appears to be another nonsurgical treatment alternative.
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