title: The return of the displaced kidney: a diagnostic dilemma during therapy of a retroperitoneal sarcoma.
mesh_terms: D002675:Child, Preschool; D005260:Female; D006801:Humans; D007668:Kidney / Q000033:anatomy & histology*; D012186:Retroperitoneal Neoplasms / Q000628:therapy; D012509:Sarcoma / Q000628:therapy