title: Bifocal disruption of the knee extensor apparatus ("floating patella") in a 13-year-old patient.
abstract: We present the unusual case of a traumatic "floating patella" in a 13-year-old healthy boy. No predisposing factors were diagnosed. The obvious bony avulsion was treated by immediate open reduction and screwing, whereas the quadriceps tendon rupture was missed diagnostically in the first step. During the course of the treatment, the extension lag lead to the delayed diagnosis of the concomitant rupture of the quadriceps tendon. After the surgical treatment of the latter, the patient healed with full function of the extensor apparatus and full ROM. Bifocal injury of the knee extensor apparatus is therefore possible in young adolescents without presenting the predisposing factors and should thus be considered.
authors.affiliation: Department of Trauma Surgery and Sports Medicine, Innsbruck Medical University, Anichstrasse 35, 6020 Innsbruck, Austria.
authors.forename: B
authors.initials: B
authors.lastname: Huber
authors.forename: M
authors.initials: M
authors.lastname: Reichenkendler
authors.forename: M
authors.initials: M
authors.lastname: Gschwentner
authors.forename: F
authors.initials: F
authors.lastname: Kralinger
mesh_terms: D000293:Adolescent; D050723:Fractures, Bone / Q000175:diagnosis / Q000601:surgery; D006801:Humans; D007718:Knee Injuries / Q000175:diagnosis / Q000601:surgery; D008297:Male; D009104:Multiple Trauma / Q000175:diagnosis / Q000601:surgery; D010329:Patella / Q000293:injuries*; D013708:Tendon Injuries / Q000175:diagnosis / Q000601:surgery