Clinical Significance of Serum Cancer Antigen 15-3 (CA15-3) as Prognostic Parameter in Non-metastatic Breast Cancer Patients: is still a valid test?

Abstract

Background: Recently, the predictive usefulness of variations in cancer antigen CA15-3 for breast cancer (BC) has received much  attention.

Objective: This study aimed to assess the relationship between the kinetics of the serum level of CA15-3 and the outcome of  patients with non-metastatic BC.

Patients and methods: This prospective single center trial was carried out in Medical Oncology  Department, South Egypt Cancer Institute (SECI), Assiut University, on 75 female patients with non-metastatic BC patients. The serum level of CA15-3 was evaluated via Roche Elecsys at three time points (pre-operative, post-operative, and after one year of follow up).  

Results: Serum CA15-3 concentration showed a significant reduction from pre- to post-operative time, from pre- to after one year of  follow up and from post-operative time to after one year of follow up (P< 0.001). No Significant relation was observed between CA15-3  and the clinic-pathological data of the studied non-metastatic BC patients. Also, CA15-3 level had no role in the survival outcome of the  studied cases.

Conclusion: The finding of the current study indicated that it is not necessary to mutually examine the pre- and  postoperative serum level CA15-3 to evaluate its role as this will not add much more clinical benefit, and that we culd examine the pre- operative serum CA15-3 concentration to avoid wasting time, effort and money.