title: Irreducible volar subluxation of the proximal interphalangeal joint due to radial collateral ligament interposition: case report and review of literature.
abstract: Irreducible volar subluxation should be considered when assessing a patient with flexion deformity of the proximal interphalangeal finger joint (PIPJ). Primary assessment requires careful examination of the collateral ligaments and extensor tendon. Preoperative imaging such as ultrasound and MRI can help identify the interposed structures and plan the subsequent operation. Although rare, irreducible volar subluxation due to radial collateral ligament interposition is an important entity to be aware of. Prompt and appropriate management can prevent joint stiffness and loss of function.
authors.affiliation: Department of Orthopaedics and Traumatology, Queen Mary Hospital, University of Hong Kong, Pokfulam, Hong Kong SAR, P. R. China.
authors.forename: Jason Pui Yin
authors.initials: JP
authors.lastname: Cheung
authors.forename: Wing Lim
authors.initials: WL
authors.lastname: Tse
authors.forename: Pak Cheong
authors.initials: PC
authors.lastname: Ho
mesh_terms: D001490:Basketball / Q000293:injuries; D017885:Collateral Ligaments / Q000293:injuries*; D003952:Diagnostic Imaging; D005383:Finger Injuries / Q000175:diagnosis / Q000601:surgery*; D005384:Finger Joint / Q000601:surgery*; D006801:Humans; D004204:Joint Dislocations / Q000175:diagnosis / Q000601:surgery*; D008297:Male; D053401:Palmar Plate / Q000293:injuries*; D055815:Young Adult
keywords: Collateral; Irreducible; PIPJ; Subluxation; Ultrasound