Subacromial decompression and rotator cuff repair were poor prognostic factors after arthroscopic treatment. Level of evidence IV, retrospective case series.doi:10.1016/j.rcot.2020.03.019Chul-Hyun ChoKi-Cheor BaeBeom-Soo KimHyung-Joo KimDu-Han KimRevue de Chirurgie Orthopédique et Traumatologique...