Retroperitoneal tumors in the pediatric population are most commonly either of renal, suprarenal/autonomic chain origin namely Wilms’ and neuroblastoma respectively. Both these tumors have distinct imaging characteristics with separate staging systems that are imperative for management. Apart from these, there is a spectrum of renal tumors that can be seen in children with varying imaging appearances as well as syndromic associations. This chapter dives deep into neuroblastoma and pediatric renal tumors with added emphasis on the staging and reporting requirements.