Objectives: We evaluated mid-term results of patients who underwent arthroscopic treatment for osteochondral lesions of the talus. Methods: The study included 28 patients (17 males, 11 females; mean age 30.3 years; range 22-55 years) who had osteochondral lesions of the talus and were treated by arthroscopic surgery. Mean duration between the occur-rence of symptoms and surgery was 8.3 months (range 3 to 17 months). Twenty-two patients (79%) had a history of trauma. Lesions were located laterally in 11 (40%) and medially in 17 (60%) patients. According to the radiologic classification (Berndt and Harty), 12 patients had stage II, six had stage III and 10 had stage IV lesions. Arthroscopic treatment consisted of antegrade drilling in stage II, removal of the loose body combined with debridement and drilling in stage III, and removal of the loose body combined with debridement and curettage in stage IV lesions. The mean follow-up was 51.1 months (range 11 to 108 months). Results: The mean preoperative and postoperative AOFAS scores were 71.6 and 86.5, respectively. According to the Martin scoring, the results were excel-lent in 14 patients, good in 10, and fair in four patients. Radiologic evaluation showed subchondral remodelation in stage II lesions; subchondral changes were observed in stage III and IV lesions, but these did not suggest arthrit-ic changes. Conclusion: We concluded that arthroscopic treatment of osteochondral lesions of the talus is a successful and effective method due to less morbidity, a shorter rehabili-tation period, and opportunity to return more rapidly to daily activities. Key words: Ankle joint/injuries; arthroscopy/methods; fracture fixation; fractures/etiology; osteochondritis/surgery/complica-tions; osteochondritis dissecans/etiology/therapy/surgery; talus/ injuries/surgery. Amaç: Talus osteokondral lezyonu olan hastalar›n tedavi-sinde artroskopik cerrahi ve orta dönem sonuçlar de¤er-lendirildi. Çal›flma plan›: Talus osteokondral lezyonu tan›s›yla art-roskopik cerrahi tedavi uygulanan 28 hasta (17 erkek, 11 kad›n; yafl ort. 30.3; da¤›l›m 22-55) çal›flmaya al›nd›. fii-kayetlerin bafllang›c› ile ameliyat aras›nda geçen süre or-talama 8.3 ay (da¤›l›m 3-17 ay) idi. Yirmi iki hastada (%79) travma anamnezi görüldü. Lezyon 11 hastada (%40) lateralde, 17 hastada (%60) ise medialde idi. Lez-yonlar, Berndt ve Harty radyolojik s›n›flamas›na göre 12 hastada evre II, alt› hastada evre III ve 10 hastada evre IV olarak de¤erlendirildi. Evre II lezyonu olan hastalara an-terograd drilleme, evre III lezyonu olanlara fragman eks-tirpasyonu, debridman ve drilleme ve evre IV lezyonu olanlara fragman ekstirpasyonu ile lezyon yata¤›n›n deb-ridman ve küretaj› ifllemi yap›ld›. Ortalama takip süresi 51.1 ay (11-108 ay) idi. Sonuçlar: Ameliyat öncesi AOFAS skorlar›n›n ortalama-s› 71.6 iken ameliyat sonras›nda 86.5'e yükseldi. Martin de¤erlendirme flemas›na göre de 14 hastada mükemmel, 10 hastada iyi ve dört hastada orta sonuç elde edildi. Rad-yolojik olarak, evre II lezyonu olan hastalarda subkondral remodelasyon izlendi; evre III ve IV lezyonlu hastalarda ise subkondral de¤ifliklikler bulundu¤u, ancak artroz ol-mad›¤› gözlendi. Ç›kar›mlar: Aç›k yöntemlere göre daha az morbiditesi, daha h›zl› rehabilitasyon süreci ve daha erken günlük ya-flama dönme olana¤› vermesi nedeniyle talus osteokond-ral lezyonlar›nda artroskopik tedavinin daha baflar›l› ve etkin bir yöntem oldu¤u sonucuna var›ld›. Anahtar sözcükler: Ayak bile¤i eklemi/yaralanma; artrosko-pi/yöntem; k›r›k fiksasyonu; k›r›k;etyoloji; osteokondrit/cerra-hi/komplikasyon; osteokondrit dissekans/etyoloji/tedavi/cerra-hi; talus/yaralanma/cerrahi.