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 ORIGINAL ARTICLE
Year : 2017  |  Volume : 54  |  Issue : 4  |  Page : 626-630

First-line tyrosine kinase inhibitors in metastatic renal cell carcinoma: A regional cancer center experience


Department of Medical Oncology, Kidwai Memorial Institute of Oncology, Bengaluru, Karnataka, India

Correspondence Address:
Dr. Tamojit Chaudhuri
Department of Medical Oncology, Kidwai Memorial Institute of Oncology, Bengaluru, Karnataka
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijc.IJC_380_17

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BACKGROUND: Renal cell carcinoma (RCC) is highly resistant to systemic chemotherapy, and historically a poor prognosis for metastatic disease has been reported, with a 5-year survival rate of <10%. Significant advances have been made in the last decade since the introduction of different tyrosine kinase inhibitors (TKIs) such as sunitinib, pazopanib, and sorafenib. Unfortunately, even though the TKIs have been used for a long time, there are very few published data regarding the experience of TKI therapy in metastatic RCC (mRCC) from India. MATERIALS AND METHODS: This is a single institutional review of mRCC patients treated between January 2012 and July 2017. Patients who received at least 1 month of first-line TKIs were included for analysis of response rates, toxicity, survival outcomes, and prognostic factors. RESULTS: Of the 40 mRCC patients, 31 (77.5%) were males. Median age at diagnosis was 58 years (range: 38–80 years). The most common site of metastasis was lungs (n = 24) followed by bone (n = 19) and liver (n = 7). Three patients had favorable risk disease, whereas 25 had intermediate risk and 12 had poor risk disease according to the MSKCC risk criteria. First-line TKI therapy used was sunitinib in 24, pazopanib in 11, and sorafenib in 5 patients. Toxicities of TKIs were Grade 1 or 2 in 13 patients and Grade 3 or 4 in 9 patients; the most common being fatigue, followed by hand-foot syndrome, skin rash, mucositis, and hypertension. Overall, 29 patients (72.5%) had disease control (complete responses in 1, partial responses in 10, and stable disease in 18 patients), whereas 11 had progression of disease at initial evaluation. At a median follow-up of 16 months (range: 2–38 months), median progression-free survival (PFS) was 10.8 months and median overall survival was 19.1 months. CONCLUSIONS: Sunitinib and pazopanib are viable first-line options for mRCC and showed a comparable PFS in Indian patients. Careful patient selection, tailoring of TKI doses, and careful toxicity management are essential for optimum therapy.






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