title: Single osteotomy at the radial diaphysis for congenital radioulnar synostosis.
abstract: OBJECTIVE
  To report the effectiveness of single derotation osteotomy at the radial diaphysis for the treatment of congenital radioulnar (RU) synostosis.
  
  
  METHODS
  Since 2000, we performed 35 radial diaphysis osteotomies on 17 boys and 9 girls younger than 9 years old (average, 5 y). The radius was cut at the midshaft and manually rotated to a neutral position. A long-arm cast was applied for 4 to 6 weeks. Complications of surgeries were recorded, and pre- and postoperative forearm position was measured.
  
  
  RESULTS
  The average postoperative follow-up was 5 years. The patient age at the final follow-up ranged from 5 to 19 years. There were no major surgery-related complications. The average forearm position was improved from 72° pronation before surgery to neutral after surgery, except 2 forearms. Elbow flexion and extension showed no change. All parents noted that daily activities were improved after surgery, and they found the surgical scar in the midforearm acceptable.
  
  
  CONCLUSIONS
  Single osteotomy at the radial diaphysis was effective for correcting pronation deformity in congenital RU synostosis in children younger than 9 years. Complications were few, and the correction was maintained through midterm follow-up.
  
  
  METHODS
  Therapeutic IV.
authors.affiliation: Hand Department, Japanese Red Cross Hospital Nagoya Daiichi, Nagoya; Hattori Orthopedic Dermatology Clinic, Aichi, Japan. Electronic address: emikoh@med.nagoya-u.ac.jp.
authors.forename: Emiko
authors.initials: E
authors.lastname: Horii
authors.affiliation: Hand Department, Japanese Red Cross Hospital Nagoya Daiichi, Nagoya; Hattori Orthopedic Dermatology Clinic, Aichi, Japan.
authors.forename: Shukuki
authors.initials: S
authors.lastname: Koh
authors.affiliation: Hand Department, Japanese Red Cross Hospital Nagoya Daiichi, Nagoya; Hattori Orthopedic Dermatology Clinic, Aichi, Japan.
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Hattori
authors.affiliation: Hand Department, Japanese Red Cross Hospital Nagoya Daiichi, Nagoya; Hattori Orthopedic Dermatology Clinic, Aichi, Japan.
authors.forename: Junko
authors.initials: J
authors.lastname: Otsuka
mesh_terms: D002648:Child; D002675:Child, Preschool; D018483:Diaphyses / Q000002:abnormalities / Q000601:surgery*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D010027:Osteotomy / Q000379:methods*; D011884:Radius / Q000002:abnormalities* / Q000601:surgery; D013580:Synostosis / Q000601:surgery*; D014457:Ulna / Q000002:abnormalities* / Q000601:surgery
keywords: Congenital radioulnar synostosis; derotation osteotomy; elbow anomaly