EXActDNA-003 / NSABP B-64: Study of Molecular Residual Disease Detection in Breast Cancer (MRD)

Inclusion criteria

• The participant or a legally authorized representative must provide study-specific informed consent prior to study entry.
• The participant must be ≥ 18 years of age.
• ECOG performance status 0 or 1.
• Histologically confirmed invasive carcinoma of the breast.
• Planned neoadjuvant therapy which includes cytotoxic chemotherapy.
• Tumor size ≥ 2.1 cm in greatest diameter.
• Unifocal or multifocal cancer documented to be the same histologic clinical subtype.
• Clinically node positive or if node negative, any one of the following:

• TNBC or HER2+ subtype
• HR+/HER2-negative with at least one of the following:

i. High tumor grade (G3) ii. Ki67 index of 20% or higher iii. High genomic risk (Oncotype DX® (ODX) Breast Recurrence Score of > 25, MammaPrint® High, etc.)

• Willing and able to comply with the study requirements, which includes the collection of a total of 34 cc (2.5 Tablespoons) of blood for each research blood draw.
• Available residual tissue from diagnostic biopsy from the breast or an involved ipsilateral lymph node for submission to create a bespoke ctDNA assay.

Exclusion criteria

• Definitive clinical or radiologic evidence of metastatic disease.
• Initiated neoadjuvant therapy for current breast cancer diagnosis.
• Synchronous diagnosis of another invasive cancer, other than this breast cancer, except for non-melanoma skin cancers.
• Completed all therapy (including endocrine therapy) <5 years ago for any previous invasive solid organ malignancy (with exception of non-melanoma skin cancers) including prior breast cancer. Individuals with a prior history of noninvasive (in situ) carcinomas may participate if they have received definitive treatment.
• Completed all therapy for any previous hematologic malignancy < 5 years ago.
• Multicentric or contralateral invasive breast cancers.
• Known pregnancy at time of enrollment.
• Prior solid organ transplant.
• Prior allogeneic hematopoietic stem cell transplant.