The Objective Response and Disease Control Rates in Patients with Liver Metastastic Breast Cancer Receiving Transarterial Radioembolization: A Meta-Analysis.

Aim: To meta-analyze the utility of transarterial radioembolization (TARE) in patients with liver metastatic breast cancer (BC), based on the objective response rate (ORR) and disease control rate (DCR).

Methods: A literature search was performed retrieving studies with (1) at least 10 patients with liver metastatic BC treated with TARE and (2) adequate information to derive ORR and DCR. The ORR is the ratio between patients with liver lesions showing complete response (CR) or partial response (PR) over the total number of patients treated with TARE; the DCR is the ratio between patients with CR, PR, or stable disease (SD) over the total number of patients treated with TARE.

Results: Eighteen studies (650 patients) were eligible; the ORR of TARE resulted 50.71% (95% C.I.: 40.04-61.36) and the DCR resulted 88.37% (95% C.I.: 81.89-93.57). Taking into account resin spheres (395 patients), the ORR was 60.35% (95% C.I.: 46.55-73.36) and the DCR was 92.73% (95% C.I.: 87.17-96.80%). Considering glass spheres (144 patients), the ORR was 32.38% (95% C.I.: 18.43-48.16) and the DCR was 82.69% (95% C.I.: 59.29-97.26).

Conclusions: This meta-analysis favors the use of TARE in patients with liver metastatic BC either with resin or glass spheres.