Endoscopic resection of a symptomatic os trigonum.

The purpose of this study was to describe our technique and results of arthroscopic resection of a symptomatic os trigonum via two posterior portals in 10 cases. Between 1999 and 2005 we treated 10 patients with endoscopic resection of a symptomatic os trigonum. The age ranged between 19 and 32 years (average 25.9). The average follow-up was 25 months (6-61 months). Time interval between the onset of pain and endoscopic resection of the os trigonum was 20 months. Of the 10 patients, 9 were symptom free for activities of daily living (ADL) within 4 weeks after surgery. They resumed their professional sport activities in a period of 8 weeks. The average AOFAS ankle/hindfoot scale increased from 43 preoperative to 87 postoperatively. We observed no complication in these 10 patients. Endoscopic resection of the symptomatic os trigonum yields good results with minimal surgical morbidity and short recovery time.