Objective:

The primary objective of the study is to compare the effectiveness of trastuzumab-chemotherapy with and without pertuzumab. As a secondary objective, we seek to evaluate the cardiac safety of the treatment.

Method:

Retrospective observational study including all patients treated with either pertuzumab-trastuzumab-chemotherapy (n = 10) or trastuzumab-chemotherapy (n = 13) (January 2015-December 2018) in a specialty hospital, which met the criteria established by the Commission Central for the Optimization and Harmonization of the pharmacotherapy of the Andalusian Health Service for the use of pertuzumab in neoadjuvance: HER2 positive tumor, negative hormonal receptors, with high risk of relapse (tumor > 2 cm or lymph node involvement). To assess effectiveness, the complete pathological response was used. For cardiac safety, the decrease in left ventricular ejection fraction greater than 10% was employed.

Results:

Complete pathological response was superior in the pertuzumab group (70.0% vs. 30.8%). Cardiac safety was similar in both.

Conclusions:

For patients with HER2 positive tumors and negative hormonal receptors with high risk criteria that receive pertuzumab, the complete pathological response is superior, with no increase in cardiac toxicity.

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