This document discusses pediatric abdominal tumors and provides information on evaluating and characterizing various tumors through imaging modalities like ultrasound, CT, and MRI. Key tumors mentioned include Wilm's tumor of the kidney, cystic nephroma, clear cell sarcoma, rhabdoid tumor, neuroblastoma, hepatoblastoma, hepatocellular carcinoma, lymphoma, leukemia, and rhabdomyosarcoma. Imaging findings for different tumors are outlined to help determine the tumor type and guide diagnosis and treatment.