Mitosis in circulating tumor cells stratifies highly aggressive breast carcinomas

Area of Science:

• Oncology
• Cell Biology
• Biomarkers

Background:

• Enumerating circulating tumor cells (CTCs) from breast cancer patients offers a minimally invasive diagnostic approach.
• Current CTC utility as a prognostic indicator is limited by the inability to stratify patients beyond general enumeration.
• Histological cytology remains the gold standard for malignancy assessment, providing detailed cellular characterization.

Purpose of the Study:

• To improve the prognostic value of circulating tumor cells (CTCs) in breast cancer.
• To compare overall survival between simple CTC enumeration and subtyping mitotic CTCs.
• To investigate the correlation between mitotic CTCs and patient survival.

Main Methods:

• A single-blind prospective pilot study involving 36 late-stage breast cancer patients over 24 months.
• Comparison of overall survival based on simple CTC enumeration versus subtyping of mitotic CTCs.
• Utilized immunohistochemical fluorescence stains for cytological subtyping of CTCs.

Main Results:

• CTC number was confirmed as a prognostic indicator (Hazard Ratio 5.2, p=0.005).
• Subtyping mitotic CTCs dramatically increased prognostic value (Hazard Ratio 11.1, p<0.001).
• Mitotic CTCs were found to be relatively common in aggressive late-stage breast cancer.

Conclusions:

• Mitotic CTCs may significantly correlate with shortened overall survival in breast cancer patients.
• Subtyping mitotic CTCs enhances their prognostic capability beyond simple enumeration.
• Larger cohort studies are recommended to further validate these findings.