Renal cell carcinoma in children

Area of Science:

• Pediatric Oncology
• Urologic Oncology
• Cancer Epidemiology

Background:

• Renal cell carcinoma (RCC) in children is rare but presents unique challenges.
• Understanding treatment outcomes and prognostic factors is crucial for improving pediatric cancer care.

Purpose of the Study:

• To review treatment outcomes for pediatric renal cell carcinoma (RCC).
• To identify prognostic factors influencing relapse-free survival in children with RCC.
• To compare the prognosis of pediatric RCC with Wilms' tumor.

Main Methods:

• Retrospective review of data from 20 children treated for RCC between 1964-1978 across four pediatric hospitals.
• Analysis of treatment modalities including surgery, chemotherapy, and radiation therapy.
• Evaluation of survival rates and relapse-free survival based on tumor stage, age, and treatment interventions.

Main Results:

• 50% of pediatric patients (10/20) survived relapse-free at a median of 4 years.
• Nephrectomy alone was associated with favorable outcomes (10/15 survivors) for Group I RCC.
• Younger age (under 11 years) correlated with better survival (6/6), while advanced stages and limited surgery showed poorer outcomes.
• Chemotherapy and radiation therapy demonstrated minimal impact on relapse-free survival.

Conclusions:

• Pediatric RCC shares similarities with adult RCC but has a generally worse prognosis than Wilms' tumor, except in the earliest stages.
• Nephrectomy is sufficient treatment for early-stage (Group I) pediatric RCC.
• Younger age at diagnosis (<11 years) is a favorable prognostic indicator for pediatric RCC.