PMID: 11326674May 1, 2001Paper

Use of TPS and CA 15-3 assays for monitoring chemotherapy in metastatic breast cancer patients

Anticancer Research
R EinarssonJ Bergh

Abstract

TPS and CA 15-3 have been applied for monitoring treatment in patients with advanced breast cancer and the relationship between the initial marker levels and the changes of the markers during chemotherapy has been established. Both markers have demonstrated high sensitivity for detecting visceral and bone metastases in the patients (90-95%) compared to soft tissues and locally advanced disease (45-50%). The marker combination, TPS and CA15-3, showed the highest sensitivity for detecting bone/visceral metastases (98%) and soft tissue/locally advanced metastases (75%). TPS showed a more frequent decrease in marker level (> 50%) compared to CA 15-3 as well as the highest correlation (68%) to the clinically confirmed events CR, PR compared to CA 15-3 (54%). In the subgroup of metastatic breast cancer patients, demonstrating increased marker levels (> 25%) during follow-up, TPS showed the highest correlation compared to the clinically confirmed progressive disease. In the subgroup of patients with clinically confirmed progression, contemporary measurements of the marker values resulted in correlation with the clinical findings in 78% for TPS and 58% for CA 15-3. TPS appears to be superior to CA 15-3 for follow-up of metastatic breas...Continue Reading

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