A prospective comparative study between concurrent chemoradiation with brachytherapy boost with concurrent...

Carcinoma esophagus is a highly malignant disease with very low cure rate. Concurrent chemoradiation is the standard of care in patients deemed unfit for surgery. Intraluminal brachytherapy (ILRT) is effective for palliation of dysphagia and is also used as a boost to external beam radiotherapy (EBRT) in curative intent.

The aim of the study was to compare the clinical outcome of definitive concurrent chemoradiation followed by ILRT boost with concurrent chemoradiation alone in locally advanced carcinoma esophagus in terms of tumor response and toxicities.

A single institutional prospective study was carried out between January 2014 and June 2015.

Fifty-seven patients of locally advanced carcinoma esophagus were allocated to study and control arms. Both groups were treated with definitive concurrent chemoradiation with 44 Gy of EBRT. The chemotherapy consisted of injection cisplatin 70 mg/m² intravenous on day 1 with capecitabine 800 mg/m² b.i.d. daily from day 1 to 4 orally on days 1 and 22 of EBRT. After 2 weeks, the control group was treated with EBRT boost of 10 Gy in 5 fractions, while the study group received intraluminal high-dose rate (HDR) brachytherapy boost of 10 Gy in 2 fractions. No concurrent chemotherapy was administered during ILRT. The treatment outcome was assessed in terms of tumor response and toxicities using the CTCAE version 4.0 criteria.

At a median follow-up of 10 months, the overall response rate was 89.2% in the control group (25/28) and 93.10% in the study group (27/29). Acute hematological and gastrointestinal toxicities were noted.

HDR ILRT in combination with EBRT is effective for treating dysphagia in cancer esophagus with low incidence of severe complications.