title: Wilms' tumour in a horseshoe kidney. Diagnostic difficulties.
abstract: A case of Wilms' tumour in a horseshoe kidney is presented. Until 1980, twenty-one cases were reported. Diagnosis may be difficult, especially as x-ray investigations, including IVP and renal angiograms, give the impression of a tumour arising outside the kidney. The distortion and dispersion of the renal pelvis and calyces usually seen with a Wilms' tumour are lacking. This is probably due to the special anatomic pattern of the horseshoe kidney, specifically the rotation of the renal pelvis around the long axis of the kidney.
mesh_terms: D005260:Female; D006801:Humans; D007223:Infant; D007668:Kidney / Q000002:abnormalities*; D007680:Kidney Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011859:Radiography; D009396:Wilms Tumor / Q000175:diagnosis / Q000000981:diagnostic imaging