title: Thirteen year old girl with one month history of back pain and limp.
mesh_terms: D000293:Adolescent; D001859:Bone Neoplasms / Q000473:pathology*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007085:Ilium / Q000473:pathology*; D012512:Sarcoma, Ewing / Q000473:pathology*