Introduction: Wilm's tumor, also known as nephroblastoma, is a common complication in children with renal cancer. It was responsible for 6% of all malignancies. It almost always affects children under the age of five. 90% of cases are diagnosed before the age of three, with the peak incidence occurring between the ages of two and five years. The case of a 2-year-old girl with Wilm's tumor is shown below. The majority of cases are unilateral, but 5% to 10% of the time both kidneys are affected. Case Presentation: A 2-year-old girl was taken to the hospital with a chief complaint of a lump in the abdomen, fever, vomiting and fatigue, nausea, swelling, pain in the abdomen, weakness. On physical examination the patient has experienced in weakness the upper and lower limb, pain experiencing in the abdomen and presenting lumps in the abdomen S1 and S2 are heard in the cardiological system, and air entry is bilaterally equal in the respiratory system. Pupils are reflected light, tone, and a palpable smooth abdominal mass is frequently discovered by chance. The infant was never admitted to a neonatal intensive care unit (NICU). There had been no previous evidence of neonatal sepsis or jaundice. For a year, the girl was breastfed. The right side of the abdomen was where the first symptoms appeared. Small at first, but quickly grew larger and more asymmetrical.