Related Experiment Videos
[Axillary lymph node involvement in hormone-independent breast carcinomas]
Alvaro Ruibal1, José Ignacio Arias
1Servicio de Medicina Nuclear, Hospital Clínico, Complejo Hospitalario Universitario, Santiago de Compostela, La Coruña, Spain.
Medicina Clinica
|July 1, 2004
Summary
Cathepsin D levels are significantly higher in hormone-independent breast cancers with lymph node invasion. This proteinase may be a useful biomarker for axillary lymph node metastasis in these tumors.
Area of Science:
- Oncology
- Biochemistry
Context:
- Hormone-independent breast cancer presents unique challenges in predicting metastasis.
- Axillary lymph node status is a critical prognostic factor.
Purpose:
- To investigate the role of cathepsin D in axillary lymph node invasion in hormone-independent breast cancer.
- To determine if cathepsin D concentration and positivity correlate with lymph node metastasis.
Summary:
- The study analyzed 77 estrogen receptor (ER) and 47 ER/Progesterone Receptor (PgR) negative breast carcinomas.
- Elevated cathepsin D concentration and percentage of positive staining were significantly associated with lymph node-positive (N+) status in both ER-negative and ER/PgR-negative tumors.
- Specifically, in ER-negative tumors, high cathepsin D was observed in N+ vs. N- tumors (p = 0.001). In ER/PgR-negative tumors, lymph node involvement correlated with cathepsin D behavior (p = 0.021).
Impact:
- These findings suggest cathepsin D may serve as a predictive biomarker for axillary lymph node invasion in hormone-independent breast cancer.
- Potential for improved patient stratification and treatment decisions based on cathepsin D expression.