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Shorter radiation after breast surgery shows promise for cancer control

NCT ID NCT03583580

Disease control Sponsor: Cancer Institute and Hospital, Chinese Academy of Medical Sciences Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing This study
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests whether a shorter, more focused radiation treatment (accelerated partial breast irradiation) after breast-conserving surgery can effectively control cancer in the breast and nearby lymph nodes for people with early-stage breast cancer. About 537 participants with low-risk tumors will receive this radiation over a shorter period than standard whole-breast radiation. The goal is to maintain high cancer control while reducing side effects and treatment time.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 537 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jul 2018

Expected to finish

Jul 2031

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

45 to 75 years

Sex

Female participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Life Expectation: \> 5 years * Enrollment date no more than 12 weeks after breast-conserving surgery or no more than 8 weeks after adjuvant chemotherapy * Histologically confirmed diagnosis of invasive ductal carcinoma (grade 1-2), or mucinous carcinoma, or papillary carcinoma, or tubular carcinoma, or medullary carcinoma: primary tumor ≤ 3.0cm in maximum diameter and pN0; or histologically confirmed DCIS: primary tumor ≤ 2.5cm in maximum diameter, low-medium grade * Unifocal tumour (confirmed by diagnostic MRI) * No lymphovascular invasion * ER positive (defined as medium-strongly nuclear staining in \>1% of the cancer cells) * Negative radial resection margins of \>= 2 mm * Surgical clips placed in the tumor bed * Written informed consent. Exclusion Criteria: * Stage Ⅱ-Ⅲ * Multifocal tumors * Histologically confirmed diagnosis of invasive ductal carcinoma (grade 3), invasive micropapillary carcinoma, carcinoma of lobular in situ, invasive lobular carcinoma * Paget's disease of the nipple * Underwent oncoplastic surgery of ipsilateral breast * Underwent neoadjuvant chemotherapy or hormonal therapy * Previous or simultaneous contralateral breast cancer * Undergone ipsilateral chest wall radiotherapy * Active collagen vascular disease.

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Conditions

The condition(s) this trial relates to.

breast cancer breast neoplasm ductal breast carcinoma in situ invasive ductal breast carcinoma invasive tubular breast carcinoma medullary thyroid gland carcinoma mucinous adenocarcinoma Neoplasm Recurrence, Local papillary carcinoma

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Breast neoplasms Neoplasm recurrence, local

Contacts and locations

Locations

  • National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences

    Beijing, Beijing Municipality, 100021, China

More trials for these conditions

Other studies related to the condition(s) this trial covers.