Circulating Tumor DNA and Immunophenotyping as Potential Biomarkers With Regional Nodal Irradiation for Breast Cancer

Mayo Clinic

Status: Active, not recruiting

Conditions: Breast Cancer

Study type: Observational

Funder types: Other

Identifiers

NCT04308720

NCI-2022-10695 (Registry Identifier)

ROR1931 (Other Identifier)

19-003532

Details and patient eligibility

About

This study will assess how radiation affects the patterns of circulating tumor deoxyribonucleic acid (ctDNA) and immune cells (T cells) during radiation treatment in patients with breast cancer. By better understanding how radiation therapy affects these markers (characteristic that is measured to see how well the body responds to a treatment for a disease) in the blood, researchers may better customize treatments for patients with breast cancer in the future.

Enrollment: 217 patients

Sex: Female

Ages: 18 to 100 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• 18 years of age or older
• Histologically confirmed primary or recurrent non-metastatic invasive breast cancer with plans for adjuvant post-lumpectomy or post-mastectomy radiation therapy at the Mayo Clinic and indications for regional nodal irradiation.
• Or patients undergoing curative intent irradiation for oligometastatic breast cancer (=< 3 sites of metastases) is permitted
• Willingness to provide informed consent and expresses understanding of this protocol and its requirements, risks, and discomforts
• Patients with non-metastatic breast cancer must have completed their final breast surgery including re-excision of margins for invasive cancer and ductal carcinoma in situ (DCIS) or chemotherapy within 90 days prior to registration but no sooner than 21 days prior to the initiation of radiation therapy (RT).
• Bilateral breast cancer is permitted
• Positive or close margins is allowed

Exclusion criteria

• Other active malignancy =< 2 years prior to registration (exceptions: non-melanotic skin cancer or carcinoma-in-situ of the cervix)
• Pregnancy or lactation
• Inability on the part of the patient to understand the informed consent to be compliant with the protocol