Clinical trial NCT06704659: Study on Recurrent Breast Cancer and Repeated Radiation Therapy
Official title: Study on Recurrent Breast Cancer and Repeated Radiation Therapy
Study type: INTERVENTIONAL
Overall status: NOT_YET_RECRUITING
Phase: NA
Conditions: Recurrent Breast Carcinoma
Keywords: Breast cancer
Recurrence
Repeat radiation therapy
Radiation therapy
Lead sponsor: Turku University Hospital
Sponsor class: OTHER_GOV
Collaborators: name: Helsinki University Hospital, Finland
First posted: 2024-11-26
Enrollment: 60
Sex: FEMALE
Minimum age (years): 55
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NON_RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: This study explores whether recurrent breast cancer can be safely treated with breast-conserving surgery and repeated radiation therapy in cases where patients have previously undergone radiation. Traditionally, recurrent breast cancer has been treated by removing the entire breast. However, recent research has shown that in certain situations, it may be possible to preserve the breast.

The study will collect data on the safety of this treatment approach and its effects on patients. The treatment follows standard breast cancer care practices, involving 30 patients from Helsinki and Turku University Hospitals. Patients are carefully selected based on specific criteria, such as tumor size, localization, and prior treatment history. Special attention is given to the planning of radiation therapy and surgical techniques.

The goal is to develop new treatment strategies that allow breast preservation even in cases of recurrent breast cancer, providing patients with high-quality and individualized care.


Eligibility criteria: Inclusion Criteria:

* The patient has a diagnosed breast cancer or tumor area in the breast with a maximum diameter of 3 cm, where a previous breast-conserving surgery has been performed (either invasive breast cancer or carcinoma in situ, DCIS).

The patient has only a local recurrence, and imaging studies show no suspicion of metastases outside the breast (preoperative staging N0M0).

At least 3 years have passed since the completion of prior radiation therapy. The new breast cancer can be technically treated with another breast-conserving surgery using a technique that does not require tissue transfer from areas opposite the removed tumor to restore the shape of the breast.

The patient is at least 55 years old at the time of surgery. The patient is willing to participate in the study. The patient is capable of providing informed consent.

Exclusion Criteria:

* A booster dose, also known as a "boost," was administered during prior radiation therapy.

Preoperative assessments suggest multifocal breast cancer, with the tumor area to be removed exceeding 3 cm.

The planned radiation therapy per the study protocol cannot be administered due to factors such as shoulder joint stiffness, a pacemaker located in the radiation field, or a skin condition (e.g., scleroderma).

The patient is unable to provide informed consent or is unwilling to participate in the study.

Metastases outside the breast (e.g., axillary or distant metastases) are present.

Primary outcomes:
measure: A treatment-limiting radiation therapy complication.
timeFrame: From the beginning of the radiotherapy until 30 days after finishing the therapy
Secondary outcomes:
measure: Quality of life
timeFrame: 5 years from surgery
measure: Second Breast Cancer Recurrence
timeFrame: 5 years from surgery
measure: Secondary malignancies
timeFrame: 5 years
Other outcomes:
Locations:
city: Helsinki
country: Finland
facility: Helsinki University Hospital
city: Turku
country: Finland
facility: Turku University Hospital
Study officials:
References: