Home›Oncology› Hypofractionated whole-breast irradiation is associated with the lowest ipsilateral breast recurrence rates in early-stage breast cancer
Hypofractionated whole-breast irradiation is associated with the lowest ipsilateral breast recurrence rates in early-stage breast cancerHypofractionated Radiation Shows Lower Recurrence Rates in Early Breast Cancer
Frontiers in MedicinePublished September 10, 2026DOI ↗Editorial oversight: Dr. Julia Lee, PhD · Oncology, Genomics & Drug Development
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Key Takeaway
Consider HF-WBI for lower ipsilateral breast recurrence rates in early-stage breast cancer patients.
This systematic review and network meta-analysis evaluated multiple radiation modalities, including hypofractionated whole-breast irradiation (HF-WBI), conventional fractionated whole-breast irradiation (CF-WBI), intraoperative electron radiotherapy (IOeRT), intraoperative radiotherapy (IORT), three-dimensional conformal radiotherapy (3D-CRT), and intensity-modulated radiotherapy (IMRT) for early-stage breast cancer. The analysis included a total of 32,655 patients.
Regarding primary outcomes, HF-WBI was associated with the lowest ipsilateral breast recurrence (IBR) rate (SUCRA: 10.54%), while CF-WBI showed the second-lowest rate (SUCRA: 35.70%). Specifically, HF-WBI vs. CF-WBI showed a decreased risk of IBR (OR, 0.78; 95% CrI, 0.56 to 0.99). In contrast, IOeRT and IORT were associated with increased risks of IBR compared to CF-WBI (OR 4.19; 95% CrI, 1.83 to 10.26 and OR 1.75; 95% CrI, 1.06 to 2.87, respectively).
For secondary outcomes, 3D-CRT and IMRT demonstrated favorable cosmetic outcomes compared to CF-WBI (OR 0.11 and OR 0.13, respectively). However, the authors note that evidence supporting these cosmetic outcomes is limited. Clinical practice relevance suggests HF-WBI is associated with the lowest IBR, while 3D-CRT and IMRT show favorable cosmetic outcomes, though the latter should be interpreted with caution due to the limited evidence base.
How this fits prior evidence
This finding addresses a gap in comparing various radiation modalities for early-stage breast cancer. While prior evidence notes that ionizing radiation exposure is associated with increased breast cancer risk (ERR/Gy of 0.56), this meta-analysis specifically evaluates the relative efficacy of different radiation techniques. It confirms that HF-WBI is associated with lower recurrence rates than CF-WBI, providing a more granular comparison of radiation delivery methods for local control.
Researchers analyzed data from over 32,000 patients with early-stage breast cancer to compare different radiation methods. The study looked at several types of treatment, including hypofractionated whole-breast irradiation (HF-WBI) and conventional fractionated whole-breast irradiation (CF-WBI).
The results showed that the hypofractionated method (HF-WBI) had the lowest rate of recurrence in the same breast. Other methods, such as intraoperative electron radiotherapy and intraoperative radiotherapy, were linked to higher risks of recurrence compared to conventional methods. Additionally, specific techniques like 3D-CRT and IMRT were noted for having better cosmetic outcomes for patients.
It is important to note that the evidence for cosmetic outcomes is currently limited. Because this was a large-scale review of existing data, the results show links between treatment types and outcomes rather than direct proof of cause. Patients should talk to their doctors to decide which radiation method is best for their specific health needs.
What this means for you:
Hypofractionated radiation showed the lowest recurrence rates in early breast cancer, while some methods favored cosmetics.
Common questions
What is the main benefit of hypofractionated radiation?
The study found that hypofractionated whole-breast irradiation (HF-WBI) was associated with the lowest rate of ipsilateral breast recurrence. This means it showed a lower risk of the cancer returning in the same breast compared to conventional fractionated methods.
Which radiation methods are best for cosmetic outcomes?
The study found that 3D-CRT and IMRT showed better cosmetic outcomes compared to conventional fractionated radiation. However, the researchers noted that the evidence for these specific cosmetic results is currently limited and should be interpreted with caution.
Are there risks with intraoperative radiotherapy (IORT)?
The study found that intraoperative radiotherapy (IORT) was linked to a higher risk of recurrence compared to conventional fractionated radiation. Specifically, it showed an odds ratio of 1.75 for recurrence. You should discuss these risks with your doctor.
Breast cancer (BC) is a common malignancy with increasing annual incidence. Radiotherapy shows favorable clinical efficacy in BC management, but limited randomized controlled trial data is a major limitation. Therefore, further validation of the optimal radiotherapeutic strategy for early-stage BC is required. This network meta-analysis evaluated radiotherapy regimens’ effects on efficacy and cosmetic outcomes in early-stage BC, guiding clinical practice. A comprehensive literature search was conducted in PubMed, Cochrane Library, Embase, and Web of Science databases to identify randomized controlled trials and cohort studies investigating radiotherapy approaches for early-stage BC. Data screening and extraction were independently performed using a standardized protocol. Study quality was assessed using the Cochrane Risk of Bias tool and Newcastle–Ottawa Scale. The primary endpoint was ipsilateral breast recurrence (IBR), and secondary endpoints included locoregional recurrence, overall survival, disease-free survival, and cosmetic outcomes. Statistical analyses were performed using R 4.4.1 and STATA 18.0. A total of 36 studies involving 32,655 patients and 9 interventions were included. The lowest IBR rate was observed in patients treated with hypofractionated whole-breast irradiation (HF-WBI) (surface under the cumulative ranking curve [SUCRA], 10.54%), followed by conventional fractionated whole-breast irradiation (CF-WBI) (SUCRA, 35.70%). Compared with CF-WBI, intraoperative electron radiotherapy (IOeRT) (odds ratio [OR], 4.19; 95% credible interval [CrI], 1.83–10.26), intraoperative radiotherapy (IORT) (OR, 1.75; 95% CrI, 1.06–2.87), and HF-WBI (OR, 0.78; 95% CrI, 0.56–0.99) demonstrated statistically significant differences. The best cosmetic outcomes were achieved with three-dimensional conformal radiotherapy (3D-CRT) (SUCRA, 14.43%), followed by intensity-modulated radiotherapy (IMRT) (SUCRA, 16.04%). Compared with CF-WBI, 3D-CRT (OR, 0.11; 95% CrI, 0.01–0.85), IMRT (OR, 0.13; 95% CrI, 0.01–0.72), and IOeRT (OR, 0.25; 95% CrI, 0.04–0.78) showed statistically significant improvements. Since evidence supporting cosmetic outcomes is limited, findings should be interpreted with caution. Among patients with early-stage BC, HF-WBI was associated with the lowest rate of postoperative ipsilateral recurrence, whereas CF-WBI was associated with the second-lowest rate. In terms of cosmetic outcomes, 3D-CRT and IMRT demonstrated favorable clinical efficacy. Additional randomized controlled trials are necessary to clarify the comparative advantages and limitations of CF-WBI, HF-WBI, 3D-CRT, and IMRT, thereby strengthening the evidence base for early-stage BC radiotherapy strategies.Systematic review registrationhttps://www.crd.york.ac.uk/PROSPERO/, identifier CRD420251173161.
