Zhou YF, Zhang ZZ, Zhang HZ, et al. - This study was sought to present an all-inside modified Broström technique to suture the anterior talofibular ligament (ATFL) and inferior extensor retinaculum under arthroscopy and to compare its outcomes with those of conventional open procedure. Between June 2014 and December 2017, all patients who had undergone arthroscopic or open repair of the ATFL were included in this study. Researchers applied visual analogue scale, Karlsson and Peterson (K-P), American Orthopedic Foot and Ankle Society ankle/hindfoot, and Tegner activity scores, as well as manual anterior drawer test to assess preoperatively and ≥ 2 years after surgery. This study enrolled a sum of 67 patients, 31 in the arthroscopic group and 36 in the open group: 43 men and 24 women with a mean body mass index of 24.00 (range, 19.53–30.03). In comparison with the preoperative condition, both open and arthroscopic modified Broström surgeries generated favorable outcomes, with a significant improvement. The all-inside arthroscopic modified Broström technique produced equivalent functional and clinical results at a minimum of 2 years after the operation with a shorter surgical duration in comparison with the open Broström-Gould procedure. The results considered that arthroscopic repair might be a safe and viable alternative to open surgery for lateral ankle stabilization.