Pediatric renal cell carcinoma: single institution 25-year case series and initial experience with partial nephrectomy.

PURPOSE: RCC represents less than 2% to 6% of pediatric renal tumors. Few reports of long-term outcomes exist. We sought to determine the presentation, treatment and outcome of patients at our institution.
MATERIALS AND METHODS: We retrospectively reviewed the age, mode of presentation, mode of treatment, histological subtype, tumor grade, stage and survival of all patients with RCC from 1980 to 2005.
RESULTS: A total of 15 patients were identified. Mean age at presentation was 7.9 years. Symptomatic presentations in nearly 75% of patients included gross hematuria, abdominal pain and polycythemia. The remaining 25% of cases were asymptomatic, and were identified by physical examination or incidentally on imaging. Surgical resection consisted of radical nephrectomy in 10 patients and partial nephrectomy in 5. Pathological analysis revealed papillary RCC in 8 patients and clear cell RCC in 7. Six patients had high stage disease. One patient with stage IV disease died 8 months postoperatively. The remaining 14 patients were alive at a mean followup of 4.9 years. All but 1 patient remain recurrence-free, including all of those who underwent nephron sparing surgery.
CONCLUSIONS: To our knowledge this single institution series is the first to include children treated with partial nephrectomy. Pediatric patients with RCC tend to be older and more likely to present symptomatically compared to the typical patient with Wilms tumor. Hematuria and abdominal pain were the most common presentations, and papillary RCC was proportionately more common in this series. Our initial experience suggests that equivalent cure rates can be expected from a nephron sparing approach in appropriately selected cases.