title: Aneurysmal bone cyst arising from a fibrous metaphyseal defect in a toddler.
abstract: This is a case of aneurysmal bone cyst arising from a fibrous metaphyseal defect of the proximal tibia in a toddler. A 32-month-old girl presented with physiologic bowing with a small metaphyseal defect at the medial aspect of the left proximal tibia. A large aneurysmal bone cyst, occupying almost the entire metaphysis of the proximal tibia, evolved from this lesion during the following 1 year 3 months. The lesion healed uneventfully after curettage and bone grafting. This case emphasizes the importance of regular followups to observe the clinical course of a fibrous metaphyseal defect during childhood.
authors.affiliation: Department of Orthopaedic Surgery, Seoul National University, Children's Hospital and Clinical Research Institute, Seoul National University Hospital, Chongno-gu, Seoul, Republic of Korea.
authors.forename: In Ho
authors.initials: IH
authors.lastname: Choi
authors.forename: Chin Youb
authors.initials: CY
authors.lastname: Chung
authors.forename: Tae-Joon
authors.initials: TJ
authors.lastname: Cho
authors.forename: In-One
authors.initials: IO
authors.lastname: Kim
authors.forename: Chong Jai
authors.initials: CJ
authors.lastname: Kim
authors.forename: Young Jin
authors.initials: YJ
authors.lastname: Sohn
mesh_terms: D017824:Bone Cysts, Aneurysmal / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D011859:Radiography; D013977:Tibia / Q000000981:diagnostic imaging / Q000473:pathology*