Abstract
Cabozantinib inhibits tyrosine kinase activity at the MET, AXL, and VEGF receptors and is approved for front-line therapy in metastatic clear cell renal cell carcinoma. Little off-protocol data exist on tolerability and response. The objective of this retrospective study was to assess off-protocol tolerability and response rates in patients with metastatic clear cell renal cell carcinoma being treated with cabozantinib. Data on baseline disease characteristics and treatment details were retrospectively gathered for patients with metastatic clear cell renal cell carcinoma treated with cabozantinib at The University of Texas MD Anderson Cancer Center from 2015 to 2017. A blinded radiologist determined the best response according to the Response Evaluation Criteria in Solid Tumors (RECIST) 1.1. Descriptive statistics were utilized. Cabozantinib has a high disease control rate (92%), even as a late line of therapy in metastatic clear cell renal cell carcinoma. However, careful monitoring is warranted, as many patients require treatment breaks and dose reductions for therapy-related toxicity.
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