Lung metastasis at initial presentation in a 3 year old girl with stage IV Wilms tumor
Background: Wilms tumor (nephroblastoma) is a malignant pediatric tumor that arises from mesodermal embryological Interfacings precursors of renal parenchyma.Lung metastasis as the first presentation of nephroblastoma occurs in 20% of cases.However, haematogenous spread to the lungs or to regional lymphnodes from a previously diagnosed nephroblasto