Treatment of squamous cell anal canal carcinoma (SCACC) with pulsed dose rate brachytherapy: a retrospective study.

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Date publication

avril 2006

Auteurs

Membres identifiés du Cancéropôle Est :
Pr PEIFFERT Didier


Tous les auteurs :
Bruna A, Gastelblum P, Thomas L, Chapet O, Bollet MA, Ardiet JM, Gerard JP, Peiffert D

Résumé

BACKGROUND AND PURPOSE: To evaluate the results of pulsed dose rate brachytherapy (PDR) in SCACC. MATERIAL AND METHODS: From 1996 to 2002, 71 patients (pts) with SCACC were treated with PDR brachytherapy. The median age was 61.2 years (35-88), with a sex ratio of 1 M/6.5 F. The TNM classification was: 14 T1, 41 T2, 15 T3 and 1 T4, 52 N0, 13 N1, 3 N2 and 3 N3. All the pts were M0. Treatment started with external beam irradiation to the posterior pelvis (mean dose: 45.5 Gy). Forty-seven patients received chemotherapy (neoadjuvant/concomitant or both). After an interval of 2-6 weeks, PDR interstitial brachytherapy was performed. The mean dose was 17.8 Gy to the 85% reference isodose of the Paris system. RESULTS: Treatment was interrupted in only one pt. With a median follow-up of 28.5 months, 2-year actuarial overall survival was 90%. Fourteen relapses occurred (four distant, three regional, and seven local). Ten patients developed a grade III complication (Lent Soma scale) and two a grade IV complication (colostomy or abdominal perineal resection for necrosis). CONCLUSION: PDR appears to be an effective treatment for SCACC. It is capable of reproducing the results usually observed with continuous LDR.

Référence

Radiother Oncol. 2006 Apr;79(1):75-9.