Cervical Boost by Ablative Stereotactic Radiotherapy (SABR) vs Brachytherapy in Patients With Cervical Carcinoma

Background Cervical cancer (CaCu) is the fourth cause of death in women. In patients with locally advanced disease, the treatment of choice is CT/RT, followed by additional boosting with brachytherapy (BT). There is an international decrease in the use of this technique due to financial restrictions. Given the difficulties in using brachytherapy as a boost, several series have described promising results in local control using boost with highly conformal techniques such as stereotactic body radiotherapy (SBRT). On the other hand, prospective studies are scarce and with controversial results. No study has been published that directly compares three-dimensional intracavitary SBRT and BT. In this clinical trial, the researchers aim to demonstrate that boosting with SBRT is not inferior to intracavitary brachytherapy in patients with CC. Methodology Primary Objective: To evaluate the safety and efficacy of concomitant CT/RT followed by Ablative Body Stereotactic Radiotherapy (SBRT) vs Brachytherapy in patients with Cervical Cancer in clinical stage IB3-IIIC1 at INCan. Secondary Objectives: The purpose of this study is to evaluate quality of life, local efficacy (local control and time to local recurrence), overall survival, disease-free survival, and time to distant recurrence. Study Design: SABRVICAL is a meticulously designed randomized two-arm open-label phase II study to compare QT/RT + SBRT vs QT/RT + Brachytherapy. It will include patients with IB3-IIIC1 CaCu \>18 years of age with adequate renal function. They will be randomized 1:1 to the experimental arm or the standard arm. Expected Results and Outlook With this study, we aim to assess that the safety and efficacy of concomitant QT/RT with cisplatin followed by SBRT is not inferior to boost with brachytherapy in patients with CaCu IB3-IIIC1. The potential impact of this study is significant, as it could provide new treatment options for hospitals that do not have brachytherapy or have a prolonged waiting list for this procedure.