alexa 90Y radioembolization of metastatic breast cancer to the liver: toxicity, imaging response, survival.
Haematology

Haematology

Journal of Blood Disorders & Transfusion

Author(s): Bangash AK, Atassi B, Kaklamani V, Rhee TK, Yu M,

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Abstract PURPOSE: To present data from patients with breast cancer liver metastases who underwent radioembolization with yttrium (90Y) microspheres. MATERIALS AND METHODS: Using standard 90Y lobar treatment protocol, 27 female patients with progressing liver metastases on standard of care polychemotherapy were treated under an open-label phase 2 protocol. After treatment, we assessed (a) tumor response using computed tomography and/or positron emission tomography, (b) biochemical toxicity, and (c) survival. RESULTS: The mean age of the patients was 52. Seventeen (63\%) patients received 20 left lobe treatments (median radiation dose, 123 Gy; mean, 119 Gy), and 20 (74\%) patients received 22 right lobe treatments (median radiation dose, 121 Gy; mean, 109 Gy) to the treatment site. No significant dose-difference was noted between the two lobes (P=.69). Tumor response on 90-day follow-up computed tomography showed (a) complete and partial response in nine (39.1\%) patients, (b) stable disease in 12 (52.1\%) patients, and (c) progressive disease in 2 (8.8\%) patients. Positive tumor response on positron emission tomography was noted in 17 (63\%) patients. Three of 27 (11\%) patients (Eastern Cooperation Oncology Group 1, 2, or 3) showed bilirubin toxicity of grade 3, all of which were attributed to disease progression. Median survival for Eastern Cooperation Oncology Group 0 versus 1, 2, or 3 patients was 6.8 months and 2.6 months, respectively (P=.24) and for patients with tumor burden<25\% versus >25\% was 9.4 and 2.0 months, respectively (P=.46). CONCLUSIONS: Radioembolization with 90Y brachytherapy device may be a viable therapeutic option for the treatment of breast cancer liver metastases in patients who have progressed or failed on standard of care polychemotherapy. This article was published in J Vasc Interv Radiol and referenced in Journal of Blood Disorders & Transfusion

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