Using a specific position during radiotherapy for left breast cancer patients

A Prospective Study on the Application of Lateral Decubitus Position in Patients With Left Breast Cancer Undergoing Adjuvant Radiotherapy

Not applicable Interventional Nanfang Hospital, Southern Medical University · NCT06902051

This study is testing if a specific way of lying down during radiotherapy can help women with left breast cancer get better treatment while protecting their other organs.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment86 (estimated)
Ages18 Years to 70 Years
SexFemale
SponsorNanfang Hospital, Southern Medical University Academic / other
Drugs / interventionsRadiation
Locations2 sites (Guangzhou, Guangdong Provinse and 1 other locations)
Trial IDNCT06902051 on ClinicalTrials.gov

What this trial studies

This clinical study evaluates the effectiveness of the lateral decubitus position in patients with left breast cancer undergoing adjuvant radiotherapy. It is a randomized, non-blind, single-center trial that recruits female patients aged 18-70 with newly diagnosed left-sided breast cancer. Participants will be assigned to either a deep inspiration breath-hold (DIBH) or free breathing (FB) group, with further division based on their ability to tolerate the DIBH technique. The study aims to compare treatment plans developed for patients in different positions to determine the best approach for minimizing radiation exposure to surrounding organs.

Who should consider this trial

Good fit: Ideal candidates are female patients aged 18-70 with newly diagnosed left-sided breast cancer who are undergoing surgery and adjuvant radiotherapy.

Not a fit: Patients with bilateral breast cancer or those who have had prior radiotherapy to the chest may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved radiotherapy techniques that better protect the heart during treatment for left breast cancer.

How similar studies have performed: While similar approaches have been explored, this specific application of the lateral decubitus position in this context is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Voluntary signing of the informed consent form
* Female patients aged 18-70 years
* Newly diagnosed left-sided breast cancer confirmed by histopathology
* No evidence of distant metastasis
* Undergoing modified radical mastectomy or breast-conserving surgery
* ECOG performance status of 0, 1, or 2
* Tolerance to radiotherapy
* Radiation field covering the entire left breast/chest wall ± regional lymphatic drainage area

Exclusion Criteria:

* Bilateral breast cancer at diagnosis
* History of breast reconstruction or implant placement on the affected side
* Prior radiotherapy to the chest or supraclavicular region
* Patients deemed unsuitable for the study based on the investigator's judgment

Where this trial is running

Guangzhou, Guangdong Provinse and 1 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Breast Cancer Early Stage Breast CancerBreast CancerRadiotherapyHeart protection
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.