CA15-3 and alkaline phosphatase as predictors for breast cancer recurrence: A combined analysis of seven International Breast Cancer Study Group trials

A. Keshaviah, S. Dellapasqua, N. Rotmensz, J. Lindtner, D. Crivellari, J. Collins, M. Colleoni, B. Thürlimann, C. Mendiola, S. Aebi, K. N. Price, O. Pagani, E. Simoncini, M. Castiglione Gertsch, R. D. Gelber, A. S. Coates, Aron Goldhirsch

Research output: Contribution to journalArticlepeer-review

Abstract

Background: We evaluated the ability of CA15-3 and alkaline phosphatase (ALP) to predict breast cancer recurrence. Patients and methods: Data from seven International Breast Cancer Study Group trials were combined. The primary end point was relapse-free survival (RFS) (time from randomization to first breast cancer recurrence), and analyses included 3953 patients with one or more CA15-3 and ALP measurement during their RFS period. CA15-3 was considered abnormal if >30 U/ml or >50% higher than the first value recorded; ALP was recorded as normal, abnormal, or equivocal. Cox proportional hazards models with a time-varying indicator for abnormal CA15-3 and/or ALP were utilized. Results: Overall, 784 patients (20%) had a recurrence, before which 274 (35%) had one or more abnormal CA15-3 and 35 (4%) had one or more abnormal ALP. Risk of recurrence increased by 30% for patients with abnormal CA15-3 [hazard ratio (HR) = 1.30; P = 0.0005], and by 4% for those with abnormal ALP (HR = 1.04; P = 0.82). Recurrence risk was greatest for patients with either (HR = 2.40; P <0.0001) and with both (HR = 4.69; P <0.0001) biomarkers abnormal. ALP better predicted liver recurrence. Conclusions: CA15-3 was better able to predict breast cancer recurrence than ALP, but use of both biomarkers together provided a better early indicator of recurrence. Whether routine use of these biomarkers improves overall survival remains an open question.

Original languageEnglish
Pages (from-to)701-708
Number of pages8
JournalAnnals of Oncology
Volume18
Issue number4
DOIs
Publication statusPublished - Apr 2007

Keywords

  • Alkaline phosphatase
  • Breast cancer
  • CA15-3
  • Tumor marker

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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