title: Radial head dislocation due to gigantic solitary osteochondroma of the proximal ulna: case report and literature review.
abstract: Developmental anterior dislocation of the radial head resulting from a congenital solitary osteochondroma of the proximal ulna is an extremely rare condition. We present a case of a 4-year-old girl with this condition affecting her right elbow, which was treated by a trapezoidal shortening osteotomy at the radial neck following an oblique ulnar osteotomy with angulation and elongation after a complete resection of the tumor mass. The child remained asymptomatic with symmetric carrying angles during 2.5 years of follow-up post-surgery. We discuss the nature of this condition and review the literature.
authors.affiliation: Department of Orthopedics, Tokushima Prefectural Central Hospital, 1-10-3, Kuramoto-cho, Tokushima, Japan 770-8539.
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Hamada
authors.affiliation: Hand Center, Tokushima Naruto Hospital, Tokushima, Japan.
authors.forename: Naohito
authors.initials: N
authors.lastname: Hibino
authors.affiliation: Department of Orthopedics, Nagoya Daiichi Red Cross Hospital, Nagoya, Japan.
authors.forename: Emiko
authors.initials: E
authors.lastname: Horii
keywords: Radial head dislocation; Solitary osteochondroma of the proximal ulna