Peripheral blood monocytes could be associated with brain metastasis and affect patient prognosis in breast cancer: a retrospective study - Scorecard - MDSpire

Peripheral blood monocytes could be associated with brain metastasis and affect patient prognosis in breast cancer: a retrospective study

  • By

  • Jihwan Yoo

  • Hun Ho Park

  • Seo Yeon Kim

  • Sung Jun Ahn

  • Jungho Ahn

  • Jiwoong Oh

  • Jaejoon Lim

  • May 21, 2026

  • 0 min

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Clinical Scorecard: The Role of Peripheral Blood Monocyte Levels in Brain Metastasis and Prognosis Among Breast Cancer Patients: A Retrospective Analysis

At a Glance

CategoryDetail
ConditionBrain Metastases in Breast Cancer
Key MechanismsChanges in peripheral blood monocyte counts and ratios (LMR, PMR) impact survival outcomes.
Target PopulationPatients with breast cancer who develop brain metastases.
Care SettingOncology clinics and hospitals managing breast cancer patients.

Key Highlights

  • Absolute monocyte count increased 2.11-fold at brain metastasis diagnosis.
  • High LMR group had a median survival of 20.0 months compared to 5.13 months in the low group.
  • High PMR group had a median survival of 14.17 months versus 5.73 months in the low group.
  • Triple-negative breast cancer subtype and low LMR are associated with poorer survival.
  • Monocyte dynamics may serve as exploratory prognostic markers.

Guideline-Based Recommendations

Diagnosis

  • Monitor peripheral blood counts at primary breast cancer diagnosis and at brain metastasis diagnosis.

Management

  • Consider the lymphocyte-to-monocyte ratio (LMR) and platelet-to-monocyte ratio (PMR) in prognostic assessments.

Monitoring & Follow-up

  • Regularly assess changes in monocyte-related ratios to evaluate prognosis.

Risks

  • Be aware that triple-negative subtype and low LMR correlate with increased risk of poor survival outcomes.

Patient & Prescribing Data

117 breast cancer patients with diagnosed brain metastases.

Survival outcomes are influenced by monocyte-related ratios and breast cancer subtype.

Clinical Best Practices

  • Utilize monocyte dynamics as potential prognostic markers in clinical evaluations.
  • Incorporate immune cell counts in treatment planning and patient counseling.

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