title: "Doughnut" sign due to metastatic Wilms' tumor.
mesh_terms: D002675:Child, Preschool; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging*; D008577:Meningeal Neoplasms / Q000000981:diagnostic imaging*; D009362:Neoplasm Metastasis; D011877:Radionuclide Imaging; D013667:Technetium; D009396:Wilms Tumor / Q000000981:diagnostic imaging*
chemical_list: D013667:Technetium