🌟 Wilms Tumor in Children (Nephroblastoma) 🔷 Definition: Wilms tumor, also called nephroblastoma, is a malignant embryonal tumor of the kidney that primarily affects young children, most commonly between the ages of 2 to 5 years. It arises from immature kidney cells (metanephric blastema) that fail to develop properly during fetal life. 🔷 Etiology and Risk Factors: Wilms tumor is usually sporadic, but in some children, it may be associated