Long-term survival of favorable-risk patients with metastatic renal cell carcinoma treated with second-line axitinib in a multicenter phase II study.

Authors

Ilya Tsimafeyeu

Ilya Tsimafeyeu

Kidney Cancer Research Bureau, Moscow, Russian Federation

Ilya Tsimafeyeu , Pavel S. Borisov , Andrey Semenov , Roman Leonenkov , Olga Novikova , Sergey Gamayunov , Nadezhda Mikhailova , Anastasia Bondarenko , Ahmed Abdelgafur

Organizations

Kidney Cancer Research Bureau, Moscow, Russian Federation, City Clinical Oncology Center, St. Petersburg, Russian Federation, Ivanovo Cancer Center, Ivanovo, Russian Federation, St. Petersburg City Cancer Center, St. Petersburg, Russian Federation, Khabarovsk Regional Cancer Center, Khabarovsk, Russian Federation, Republican Clinical Oncological Center, Cheboksary, Russian Federation, Republican Clinical Oncological Center, Kazan, Russian Federation, I.M. Sechenov First Moscow State Medical University, Moscow, Russian Federation

Research Funding

Other
Kidney Cancer Research Bureau.

Background: Tyrosine kinase inhibitors remain possible treatment options in favorable risk patients newly diagnosed with metastatic renal cell carcinoma (mRCC). In phase II study (FavorAx), axitinib showed the activity in mRCC patients with a favorable risk and history of prior VEGFR-directed therapy. Here we present the outcomes from expansion study cohort with 4 years follow-up. Methods: Patients were required to have clear-cell mRCC, favorable risk according to IMDC criteria, and to have received first-line treatment with sunitinib or pazopanib. Prior treatment with other agents was not permitted. Axitinib was given orally at a starting dose of 5 mg twice daily with possible dose titration. Treatment was continued until disease progression according to RECIST version 1.1, unacceptable toxicity, death, or withdrawal of consent. All patients were assessed for efficacy. Endpoints included progression-free survival (PFS, primary); overall survival (OS), objective response rate (ORR), and safety (secondary). Results: A total of 55 patients were assessed, 58% of whom were male. Median age was 64 years. 29 (53%) patients had 2 and more metastatic sites. 73% and 27% of patients received first-line sunitinib or pazopanib. The median PFS was 19 months (95% CI, 15–23) and the median OS was 29.4 months (95% CI, 21.5–37). The 4-year OS rate was 36%. The objective response rate was 31% and 2 (3.6%) patients achieved a complete response. Disease progression was the single reason for discontinuation of axitinib. After disease progression, 62% of patients received third-line therapy. The toxicity was consistent with previously reported data. The most common adverse events associated with axitinib were hypertension, fatigue, and diarrhea, each occurring in more than 20% of patients. Conclusions: Second-line axitinib continues to show efficacy in favorable risk patients with mRCC. Long-term OS and PFS were observed with axitinib. Clinical trial information: NCT02700568.

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Abstract Details

Meeting

2021 Genitourinary Cancers Symposium

Session Type

Poster Session

Session Title

Poster Session: Renal Cell Cancer

Track

Renal Cell Cancer

Sub Track

Therapeutics

Clinical Trial Registration Number

NCT02700568

Citation

J Clin Oncol 39, 2021 (suppl 6; abstr 332)

DOI

10.1200/JCO.2021.39.6_suppl.332

Abstract #

332

Poster Bd #

Online Only

Abstract Disclosures