OBJECTIVE: The aim of this study was to evaluate the effect of concomitant Lafosse Type II subscapularis (SSC) tears on the clinical and functional outcomes in patients with medium-sized supraspinatus (SS) tears.MATERIAL AND METHODS: Between January 1, 2023, and January 1, 2025, a total of 41 patients (20 females and 21 males) who underwent arthroscopic rotator cuff repair and met the inclusion criteria were retrospectively reviewed. The SSC (+) group included patients with Lafosse Type II SSC tears who underwent repair, whereas the SSC (–) group included patients with arthroscopically confirmed intact SSC tendons. All patients were evaluated preoperatively and at the final follow-up using the Visual Analog Scale (VAS), American Shoulder and Elbow Surgeons (ASES) score, Disabilities of the Arm, Shoulder and Hand (DASH) score, and Subjective Shoulder Value (SSV).RESULTS: The mean age of the patients was 55.65 ± 9.35 years, with the mean follow-up of 13.05 ± 4.74 months. The right shoulder was most commonly affected (70.7%), and 80.5% of tears occurred on the dominant side. There were no significant differences between the groups in terms of preoperative VAS, ASES, DASH, and SSV scores (p=0.883, p=0.547, p=0.799, p=0.718). Postoperatively, both groups demonstrated significant improvement in all clinical scores, but no statistically significant differences were observed between the SSC (+) and SSC (–) groups (p=0.211, p=0.076, p=0.327, p=0.072). No cases of pseudo paralysis were observed preoperatively, and no severe motion loss leading to functional restriction was seen during postoperative follow-up.CONCLUSIONS: In medium-sized SS tears accompanied by Lafosse Type II SSC tear, short-term clinical and functional outcomes after repair are similar to the outcomes in patients with isolated SS tears.