title: Boxer's Knuckle.
abstract: Tear of the dorsal capsule of a finger metacarpophalangeal joint is an uncommon injury that should be differentiated from an injury to the sagittal fibers of the extensor hood. While the latter injury can often be treated nonoperatively, a dorsal capsular injury usually requires surgery, particularly in athletes who are disabled by the injury.
authors.affiliation: New York University-Hospital for Joint Diseases, Department of Orthopaedic Surgery, New York, New York, U.S.A.
authors.forename: Michael
authors.initials: M
authors.lastname: Stracher
authors.forename: Martin A
authors.initials: MA
authors.lastname: Posner