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Introduction: Little is known about the development of specific acromioclavicular joint osteoarthritis. Its histologic alterations are controversial, and radiologic alterations are seen in asymptomatic people. The objective of this study was to evaluate histologically the distal clavicle subchondral bone and to analyze magnetic resonance images in patients with painful and nonpainful acromioclavicular joint osteoarthritis. Methods: An observational, analytical, and cross-sectional study with a control group was conducted. Between August 2018 and June 2019, we analyzed a total of 41 patients. Group 1 consisted of patients with pain in the acromioclavicular joint (symptomatic osteoarthritis), and group 2 consisted of patients without pain in the acromioclavicular joint (asymptomatic osteoarthritis). Results: Twelve of the 15 patients with acromioclavicular joint pain (group 1) were female, 13 presented distal clavicle edema on magnetic resonance imaging, and 9 had subchondral bone edema on histologic examination. Patients with acromioclavicular joint pain had longer shoulder pain duration than patients without pain. Women were more likely to have acromioclavicular joint pain compared with men. Patients with edema on magnetic resonance imaging showed a greater chance of presenting pain in the acromioclavicular joint in comparison with patients without edema. Conclusion: Women had a higher chance of presenting with acromioclavicular joint pain than men. Patients with edema on magnetic resonance imaging were more likely to present with pain than patients without edema. Patients with acromioclavicular joint pain had longer shoulder pain duration than patients without pain, and subchondral bone edema on histologic examination was more frequent in patients with pain.

Background: Although there is a low incidence of shoulder instability in women, this population is still representative and is often associated with lower rates of return to sports. Few studies have evaluated the results of the Latarjet procedure in this population. Methods: This was a prospective cohort study of female athletes who underwent the Latarjet procedure between 2013 and 2018. The participants were followed up for 3 years. The primary outcomes of the study included the visual analog scale for pain; range of motion: active elevation, passive elevation, active external rotation, and passive external rotation. The functional scores were as follows: American Shoulder and Elbow Surgeons score, the Western Ontario Shoulder Instability Index, and the Athletic Shoulder Outcome Rating Scale. Additional data were collected regarding return to sport, complication rates, and patient satisfaction. Results: Thirteen female athletes who practice Soccer, Volleyball, Basketball, Handball, Judo, or Weight training were evaluated. There was a significant reduction in the mean range of motion for all movements at 4 weeks after surgery. Patients recovered a range of motion similar to the preoperative values after 6 months. The mean visual analog scale reached 6.39 at the first week after surgery and decreased to values below preop at 8 weeks. The mean preoperative Western Ontario Shoulder Instability Index was 126.77 (min 118; max 135), and at the end of follow-up, the WOSI index was 45.08 (min 37; max 65; P