title: Extraosseous aneurysmal bone cyst.
abstract: A 73-year-old man developed an enlarged cystic lesion located in the soft tissues surrounding the left hip. The lesion was surgically removed. The patient was well 1 year after surgery. The lesion was histologically identical to an aneurysmal bone cyst, therefore it was diagnosed as an extraosseous aneurysmal bone cyst. The differential diagnoses and a review of the literature are presented.
authors.affiliation: Department of Radiology and Anatomic Pathology, University of Bologna, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Riccioni
authors.forename: M P
authors.initials: MP
authors.lastname: Foschini
mesh_terms: D000368:Aged; D017824:Bone Cysts, Aneurysmal / Q000473:pathology / Q000601:surgery; D006615:Hip; D006801:Humans; D008297:Male