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World J Radiol. 2012 Jul 28;4(7):318-23. doi: 10.4329/wjr.v4.i7.318.

Concurrent use of aromatase inhibitors and hypofractionated radiation therapy.

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1
Cyrus Chargari, Pablo Castro-Pena, Ivan Toledano, Marc A Bollet, Fran├žois Campana, Patricia De Cremoux, Alain Fourquet, Youlia M Kirova, Department of Radiation Oncology, Institut Curie, 75005 Paris, France.

Abstract

AIM:

To retrospectively assess the acute and long-term toxicity using aromatase inhibitors (AI) therapy concurrently with hypofractionated radiotherapy (HFRT) in breast cancer patients.

METHODS:

From November 1999 to October 2007, 66 patients were treated with breast HFRT and concurrent AI. In 63 patients (95.5%), HFRT delivered a total dose of 32.5 Gy to the whole breast within 5 wk (five fractions, one fraction per week). Other fractionations were chosen in three patients for the patients' personal convenience. A subsequent boost to the tumor bed was delivered in 35 patients (53.0%). Acute toxicities were scored according to the Common Toxicity Criteria for Adverse Events v3. Late toxicity was defined as any toxicity occurring more than 6 mo after completion of HFRT and was scored according to the Late Effects Normal Tissue Task Force-Subjective, Objective, Management and Analytic scale.

RESULTS:

At the end of the HFRT course, 19 patients (28.8%) had no irradiation-related toxicity. Acute grade 1-2 epithelitis was observed in 46 patients (69.7%). One grade 3 toxicity (1.5%) was observed. With a median follow-up of 34 mo (range: 12-94 mo), 31 patients (47%) had no toxicity, and 35 patients (53%) presented with grade 1-2 fibrosis. No grade 3 or greater delayed toxicity was observed.

CONCLUSION:

We found that AI was well tolerated when given concurrently with HFRT. All toxicities were mild to moderate, and no treatment disruption was necessary. Further prospective assessment is warranted.

KEYWORDS:

Aromatase inhibitors; Breast cancer; Hypofractionated radiotherapy; Skin toxicity

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