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Table 3 Summary of the clinical trials regarding pre-operative breast cancer radiotherapy in more than one fraction

From: Single fraction ablative preoperative radiation treatment for early-stage breast cancer: the CRYSTAL study – a phase I/II clinical trial protocol

Trial ID

Status

Title

Treatment

Description/endpoint

Primary outcome measure

Estimated/ actual primary completion date

NCT04360330

Recruiting

SABER study for selected early-stage BC

Stereotactic Ablative RT

RT dose: 4 predefined dose levels (35 Gy, 40 Gy, 45 Gy, 50 Gy, in 5 fractions given on non-consecutive days, over a period of 2 weeks). Then standard of care surgery.

Find the most effective RT dose to give to BC in a shorter period of time, prior to surgery. Toxicity, cosmesis and quality of life will be assessed.

Find the recommended Phase 2 Dose of Pre-Operative SABER in terms of the highest dose level tested for which no more than 1 out of 6 patients experience DLT

August 2023

NCT04234386

Recruiting

GammaPod Dose Escalation RT for early-stage BC

GammaPod Radiation

RT dose: 4 predefined dose levels (21 Gy, 24 Gy, 27 Gy, 30 Gy). Then standard of care surgery.

Determine a safe and effective dose of pre-operative RT to treat early stage BC. Cosmesis and quality of life will be assessed.

Establish the single-fraction MTD and DLTs

December 2025

NCT03624478

Recruiting

Hypofractionated RT in Treating Participants with BC before surgery

Hypofractionated RT

RT dose: NS

(5 consecutive days followed by standard of care surgery).

Assess the efficacy, toxicity, cosmetic outcome and pathologic changes of hypofractionated RT in treating breast cancer before surgery (phase II trial)

pCR

August 17, 2021

NCT03043794

Recruiting

Study of Stereotactic RT for BC

Stereotactic RT

RT dose: 21 Gy followed by standard of care surgery.

Assess the efficacy, toxicity, cosmetic outcome, quality of life, and translational correlates to preoperative stereotactic RT for low risk BC (phase II trial)

pCR

August 1, 2022

  1. List of abbreviations: BC breast cancer, RT radiotherapy, MTD maximum tolerated dose, DLT dose limiting toxicity, pCR pathological complete response, NS not stated