Abstract
This report presents the first documented case of Wilms' tumor concurrently affecting the kidney and ovary in a 5-year-old girl. The patient presented with an abdominal mass, initially suspected to be an ovarian germ cell tumor. An incidental left renal mass was identified during the radiologic evaluation. Histopathology confirmed Wilms' tumor with unfavorable histology in both the kidney and ovary. Surgical interventions and adjuvant therapies resulted in a favorable response. This publication aims to underscore the rarity of such presentations and highlight the need for increased awareness and further research to improve management strategies for these challenging pediatric malignancies.