Bone marrow micrometastases and circulating tumor cells: current aspects and future perspectives

Area of Science:

• Oncology
• Cell Biology

Background:

• Early tumor cell dissemination in breast cancer can be detected at the single-cell level using advanced immunocytochemical and molecular assays.
• Clinical studies show that disseminated tumor cells (DTCs) in bone marrow at initial diagnosis are a significant independent prognostic factor for over 4000 breast cancer patients.
• Emerging assays for detecting circulating tumor cells (CTCs) in peripheral blood also indicate potential clinical relevance.

Purpose of the Study:

• To evaluate the prognostic significance of early tumor cell dissemination in breast cancer.
• To explore the potential of disseminated tumor cells (DTCs) and circulating tumor cells (CTCs) as biomarkers for therapeutic response assessment.

Main Methods:

• Utilizing sensitive immunocytochemical and molecular assays for single-cell level detection of disseminated tumor cells.
• Analyzing data from clinical studies involving over 4000 breast cancer patients.
• Reviewing recently developed assays for circulating tumor cell detection in peripheral blood.

Main Results:

• The presence of DTCs in bone marrow at primary diagnosis is an independent prognostic factor in breast cancer.
• Assays for CTCs in peripheral blood show potential clinical relevance.

Conclusions:

• Disseminated tumor cells in bone marrow and circulating tumor cells in blood are valuable prognostic indicators in breast cancer.
• These cells can serve as markers for early assessment of therapeutic response in clinical trials.