title: A case of an aneurysmal bone cyst of a metatarsal: review of the differential diagnosis and treatment options.
abstract: Aneurysmal bone cyst localized to the metatarsus, while not unheard of, is rather uncommon. The differential diagnosis for this lesion can be challenging, particularly in regard to the possibility of the presence of other giant cells containing tumors of bone, such as giant cell tumor, giant cell reparative granuloma, Brown's tumor of hyperparathyroidism, and telangiectatic osteosarcoma. We report a case of an aneurysmal bone cyst localized to the third metatarsal in a 14-year-old girl who presented with limping, progressively worsening local pain, and swelling in her left foot. The differential diagnosis for her condition was extensive. Ultimately, an en bloc resection was undertaken and the defect was replaced with tricortical iliac autograft. Pathological analysis of the resected tissue was consistent with aneurysmal bone cyst. There was complete healing with no sign of recurrence 3 years after the surgery.
  
  
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authors.affiliation: Ankara Training and Research Hospital, Department of 2nd Orthopaedics and Traumatology, Ankara, Turkey.
authors.forename: Serkan
authors.initials: S
authors.lastname: Iltar
authors.forename: Kadir Bahadir
authors.initials: KB
authors.lastname: Alemdaroğlu
authors.forename: Nazim
authors.initials: N
authors.lastname: Karalezli
authors.forename: Kaan
authors.initials: K
authors.lastname: Irgit
authors.forename: Muzaffer
authors.initials: M
authors.lastname: Caydere
authors.forename: Nevres Hürriyet
authors.initials: NH
authors.lastname: Aydoğan
mesh_terms: D000293:Adolescent; D017824:Bone Cysts, Aneurysmal / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008682:Metatarsal Bones