title: Lateral patellar retinaculum reconstruction for medial patellar instability following lateral retinacular release: a case report.
abstract: Lateral retinacular release is still being performed in patients with recurrent patellar dislocation as an additional procedure with distal realignment or medial patellofemoral ligament (MPFL) reconstruction. However, consensus remains lacking regarding suitable indications for lateral retinacular release. A 20-year-old woman presented with patellar instability in both medial and lateral directions after undergoing lateral retinacular release with MPFL reconstruction. She displayed inherent systemic joint laxity meeting all seven Carter-Wilkinson criteria. Simultaneous MPFL revision and lateral retinaculum reconstruction successfully improved patellar instability in both directions. This case provides an example of iatrogenic medial patellar instability after failed lateral retinacular release.
authors.affiliation: Department of Orthopaedic Surgery, Keio University, School of Medicine, Japan.
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Udagawa
authors.affiliation: Department of Orthopaedic Surgery, Keio University, School of Medicine, Japan. Electronic address: y.niki@lib.bekkoame.ne.jp.
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Niki
authors.affiliation: Department of Orthopaedic Surgery, Keio University, School of Medicine, Japan.
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Matsumoto
authors.affiliation: Institute for Integrated Sports Medicine, Keio University, School of Medicine, Japan.
authors.forename: Hideo
authors.initials: H
authors.lastname: Matsumoto
authors.affiliation: Department of Orthopaedic Surgery, Keio University, School of Medicine, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Enomoto
authors.affiliation: Department of Orthopaedic Surgery, Keio University, School of Medicine, Japan.
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Toyama
authors.affiliation: Department of Orthopaedic Surgery, Keio University, School of Medicine, Japan.
authors.forename: Yasunori
authors.initials: Y
authors.lastname: Suda
mesh_terms: D001182:Arthroscopy; D005260:Female; D006801:Humans; D007593:Joint Instability / Q000209:etiology / Q000601:surgery*; D008023:Ligaments, Articular / Q000601:surgery*; D031222:Patellar Dislocation / Q000000981:diagnostic imaging / Q000601:surgery*; D017847:Patellar Ligament / Q000601:surgery*; D011183:Postoperative Complications; D011859:Radiography; D012008:Recurrence; D055815:Young Adult
keywords: Lateral patellar retinaculum; Lateral retinacular release; Medial patellofemoral ligament; Reconstruction; Recurrent patellar dislocation