Postoperative interstitial radiotherapy of keloids by iridium 192: a retrospective study of 46 treated scars

Dermatology : International Journal for Clinical and Investigative Dermatology
P ClavereJ Rousseau

Abstract

Keloids are clinically vexacious scars characterized by a high recurrence rate after excision alone (50-100%). Many adjuvant techniques have been used with more or less convincing results. The aim of this study is to show the efficiency of keloidectomy and postoperative interstitial radiotherapy by an iridium 192 wire. During a 14-year period, 39 patients with keloids (46 keloids) were treated by this regimen. Seven patients had been previously treated by intralesional corticosteroids, surgery alone or postoperative interstitial radiotherapy, without improvement. A dose of 12 Gy (7 keloids) to 15 Gy (22 keloids) was delivered at a point 2.5 mm from the axis of the wire. For 17 keloids the dose schedule was 15 Gy at a point 5 mm to the wire. The median follow-up was 7 months. The overall success rate is close to 63%. A recurrence occurred in 14 cases without relation to the method used, the age or the localization of the lesions. There were no side effects observed. Postoperative interstitial radiotherapy represents an effective, unconstraining and safe treatment for keloids if the contraindications are respected.

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