Single vs Multiple Fraction Radiotherapy for Breast Cancer

This trial examines two methods of delivering radiation therapy to women who have undergone a lumpectomy for breast cancer. It seeks to determine whether a single large dose of radiation (Single Fraction Partial Breast Irradiation, PBI) is as effective and safe as multiple smaller doses (Multiple Fraction Partial Breast Irradiation, PBI). The researchers aim to assess if the single treatment can reduce time and travel for patients without compromising care. Women who have had breast cancer surgery, with a tumor under 3 cm, may be suitable candidates for this study. As an unphased trial, this study provides a unique opportunity to explore innovative treatment options that could simplify and enhance patient care.

The trial information does not specify whether you need to stop taking your current medications. It's best to discuss this with the trial coordinators or your doctor.

Studies have shown that both single-session and multiple-session partial breast irradiation (PBI) are well-tolerated treatments for breast cancer. Research indicates that multiple-session PBI, administered in five daily doses, has side effects similar to other treatment schedules. Patients have reported minimal short-term and long-term side effects, making it a reliable option for early-stage breast cancer.

Recent findings suggest that single-session PBI is also well-tolerated. This method delivers the entire radiation dose in one session. Patients have experienced minimal side effects, and the treatment has shown promising early results in controlling cancer. Both treatment types aim to limit exposure to healthy tissues, reducing side effects.

Researchers are excited about these radiotherapy treatments for breast cancer because they offer more flexible and potentially less burdensome options compared to conventional whole-breast irradiation. Unlike standard treatments that often involve multiple weeks of daily sessions, the Multiple Fraction Partial Breast Irradiation (PBI) delivers radiation in just five daily doses. Meanwhile, the Single Fraction PBI is even more streamlined, requiring just one session with a precise 13 Gy dose. These approaches could significantly reduce treatment time and increase convenience for patients, while maintaining effectiveness.

This trial will compare Single Fraction Partial Breast Irradiation (PBI) with Multiple Fraction PBI for treating early-stage breast cancer. Studies have shown that Multiple Fraction PBI, delivered over five treatment sessions, effectively prevents cancer recurrence, with about 91.8% of patients remaining cancer-free after 10 years. Meanwhile, researchers are exploring Single Fraction PBI, which involves just one treatment session, as a more convenient option. Early results suggest it controls cancer effectively and is easy for patients to tolerate. Both methods aim to target the tumor area while limiting exposure to healthy tissue, helping to reduce side effects.²⁴⁶⁷⁸