title: Treatment of an aggressive aneurysmal bone cyst with percutaneous injection of polidocanol: a case report.
abstract: BACKGROUND
  Aneurysmal bone cysts are benign tumours that usually present in childhood. Aggressive forms have been described, which are often treated with surgery that entails major resection and reconstruction. Polidocanol sclerotherapy has recently been reported to have excellent results and promises to replace operative treatments, but its efficacy in the case of aggressive aneurysmal bone cysts has not been documented.
  
  
  METHODS
  An 18-year-old woman from Sweden presented with pain in her shoulder and a rapidly progressing cystic bone lesion. The differential diagnosis was a rare, aggressive form of aneurysmal bone cyst or a sarcoma of the proximal humerus. She was successfully treated using sequential percutaneous injections of polidocanol after exclusion of malignancy.
  
  
  CONCLUSIONS
  Management of aggressive aneurysmal bone cysts has thus far relied on open surgery. We propose that non-operative treatment with polidocanol is efficient even in the aggressive form of the aneurysmal bone cyst.
authors.forename: Otte
authors.initials: O
authors.lastname: Brosjö
authors.affiliation: Section of Orthopaedics, Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm S-17176, Sweden. tsagozis@gmail.com.
authors.forename: Panagiotis
authors.initials: P
authors.lastname: Tsagozis
mesh_terms: D000293:Adolescent; D017824:Bone Cysts, Aneurysmal / Q000175:diagnosis* / Q000188:drug therapy*; D003937:Diagnosis, Differential; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007267:Injections; D007592:Joint Diseases / Q000175:diagnosis* / Q000188:drug therapy*; D008279:Magnetic Resonance Imaging; D000077423:Polidocanol; D011092:Polyethylene Glycols / Q000008:administration & dosage / Q000627:therapeutic use*; D012597:Sclerosing Solutions / Q000627:therapeutic use; D012785:Shoulder Joint; D016896:Treatment Outcome
chemical_list: D012597:Sclerosing Solutions; D000077423:Polidocanol; D011092:Polyethylene Glycols