Background: Symptomatic os trigonum is a rare condition well described in adults responsible for chronic ankle pain. To date there is no published case of successfully managed symptomatic os trigonum in children.
Methods: We retrospectively reviewed 4 paediatric patients (11-17) successfully operated on for a symptomatic os trigonum through a postero medial approach. One case was bilateral.
Results: Pain relief was postoperatively obtained in all cases. All of the patients were able to return to physical activities after 3 months. The mean follow up was 12 months.
Conclusion: Symptomatic os trigonum may be responsible for chronic ankle pain in children and adolescents as well as in adults. The surgical treatment is effective in children.