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COMPARATIVE STUDY
JOURNAL ARTICLE
Impact of tumor size on the outcome of patients with small renal cell carcinoma.
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BACKGROUND: This study aims to establish potential correlation between tumor size and outcomes in patients with T1a kidney cancer registered within the surveillance, epidemiology and end results (SEER) database.
METHODS: SEER database (2004-2013) has been accessed through SEER*Stat program to determine the correlation between tumor size and cancer-specific survival in patients with T1a kidney cancer. Survival analysis was conducted through Kaplan-Meier analysis and log-rank testing.
RESULTS: Five year kidney cancer-specific survival rates show progressive decline with increasing tumor size. Moreover, kidney cancer-specific survival has been compared according to the initial local treatment modality (observation, ablation, partial or radical nephrectomy) across different size categories (<1 cm, 1-2 cm, 2-3 cm and 3-4 cm). Survival curves of different treatment modalities were almost overlapping for patients with renal mass < 1cm. For patients with tumor size 1-2 cm, treatment modalities were overlapping at the first 60 months then the curve of observation diverged (P <0.0001). For patients with tumor size 2-3 cm and 3-4 cm, the curve of observation diverged early in the time course (P <0.0001).
CONCLUSION: Primary tumor size is an important factor that should be taken into consideration when evaluating the different treatment options for patients with small kidney cancers..
METHODS: SEER database (2004-2013) has been accessed through SEER*Stat program to determine the correlation between tumor size and cancer-specific survival in patients with T1a kidney cancer. Survival analysis was conducted through Kaplan-Meier analysis and log-rank testing.
RESULTS: Five year kidney cancer-specific survival rates show progressive decline with increasing tumor size. Moreover, kidney cancer-specific survival has been compared according to the initial local treatment modality (observation, ablation, partial or radical nephrectomy) across different size categories (<1 cm, 1-2 cm, 2-3 cm and 3-4 cm). Survival curves of different treatment modalities were almost overlapping for patients with renal mass < 1cm. For patients with tumor size 1-2 cm, treatment modalities were overlapping at the first 60 months then the curve of observation diverged (P <0.0001). For patients with tumor size 2-3 cm and 3-4 cm, the curve of observation diverged early in the time course (P <0.0001).
CONCLUSION: Primary tumor size is an important factor that should be taken into consideration when evaluating the different treatment options for patients with small kidney cancers..
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