title: Cystic mesoblastic nephroma.
abstract: Mesoblastic nephroma is the most common solid renal neoplasm in the first few months of life. It has been recognized only recently as a distinct entity, having been classified previously as Wilms tumor. There are relatively few ultrasonic descriptions of this entity in the literature. We present an additional case featuring a large peripheral cystic component with a solid central core demonstrated on ultrasonograhy. This feature is not specific for mesoblastic nephroma and occurs in cystic Wilms tumor.
mesh_terms: D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007223:Infant; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D011859:Radiography; D009396:Wilms Tumor / Q000000981:diagnostic imaging* / Q000473:pathology