title: Percutaneous drilling of symptomatic accessory navicular in young athletes.
abstract: BACKGROUND
  Results of percutaneous drilling for symptomatic type II accessory tarsal navicular bone are not determined.
  
  
  OBJECTIVE
  Percutaneous drilling of accessory navicular synchondrosis will induce or accelerate bone union between the accessory and primary navicular bones. Bone union of the synchondrosis leads to symptomatic relief.
  
  
  METHODS
  Case series; Level of evidence, 4.
  
  
  METHODS
  Thirty-one feet of 29 patients with type II accessory tarsal navicular treated by percutaneous drilling were reviewed.
  
  
  RESULTS
  Twenty-four feet (77.4%) were assessed as excellent, 6 (19.4%) as good, and 1 (3.2%) as fair. No feet were assessed as poor. Bone union was obtained in 16 (80%) of the 20 feet when the proximal phalanx of the great toe was immature and in 2 of the 11 feet when it was mature.
  
  
  CONCLUSIONS
  Percutaneous drilling of the synchondrosis was effective for a symptomatic type II accessory navicular, especially in patients with immature proximal phalanx of the great toe.
authors.affiliation: Saiseikai Gose Hospital, Department of Orthopaedic Surgery, Gose, Japan.
authors.forename: Shoichiro
authors.initials: S
authors.lastname: Nakayama
authors.forename: Kazuya
authors.initials: K
authors.lastname: Sugimoto
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Takakura
authors.forename: Yasuhito
authors.initials: Y
authors.lastname: Tanaka
authors.forename: Ryoji
authors.initials: R
authors.lastname: Kasanami
mesh_terms: D000293:Adolescent; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D019637:Orthopedic Procedures / Q000379:methods; D011859:Radiography; D013177:Sports; D013639:Tarsal Bones / Q000002:abnormalities / Q000000981:diagnostic imaging / Q000601:surgery*; D016896:Treatment Outcome