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Clinical outcome of incidentally discovered small renal cell carcinoma after delayed surgery
Koichi Sugimoto1, Nobutaka Shimizu, Takashi Oki
1Department of Urology, Kinki University Faculty of Medicine, Osaka-Sayama, Osaka, Japan ; Department of Urology, Sakai Hospital Kinki University Faculty of Medicine, Sakai, Osaka, Japan.
Background:
This study was undertaken to investigate the growth rate and clinical outcome of patients with a small renal mass (SRM) after delayed surgery.
Methods:
We reviewed the clinical records of 34 patients with SRMs ≤ 4 cm at diagnosis, who underwent delayed surgical intervention during surveillance from January 2000 to December 2011. Radiographic evaluations using computed tomography (CT) scan and magnetic resonance imaging (MRI) were performed at least every 6 months, and the tumor size was determined at least twice.
Results:
The mean follow-up time was 26.6 ± 18.6 months and mean tumor doubling time was 23.4 ± 16.0 months. Histopathological analysis revealed that 32 of the 34 patients were malignant in pT1aN0M0. Only one patient showed tumor recurrence, who subsequently died due to tumor progression.
Conclusion:
The growth rate of the small renal mass was slow in the majority of our patients. Delayed intervention does not have a detrimental effect on cancer-specific outcomes.
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