Retreatment of advanced esthesioneuroblastoma with high-activity I-125 endocurietherapy: a case report.

A 67-year-old woman presented with an advanced esthesioneuroblastoma that recurred 2 years following external irradiation. She was successfully retreated with continuous low-dose rate interstitial irradiation from high-activity I-125 seeds implanted permanently into the tumor.