Background: Ultrasound is useful in detecting acromioclavicular pathologies in cases of trauma, inflammations and degenerative changes.
Objectives: To describe the sonographic findings of the acromioclavicular joint pathology in patients with anterior shoulder pain.
Methods: Sonographic examination of the ACJ was used to examine 30 adults with anterior shoulder pain. As a control group we studied 30 asymptomatic patients and compared the findings to plain radiographs of the symptomatic group.
Results: The pathologic findings consisted of swelling of the joints, bone irregularities, widening and/or narrowing of the ACJ, soft tissue cyst formation, excessive fluid collection, and calcification. All these signs represent degenerative changes compatible with early osteoarthritis. We encountered one case of septic arthritis that required joint aspiration and antibiotic treatment.
Conclusions: It is our belief that ultrasonography should be used routinely in cases of anterior shoulder pain since it demonstrates various pathologies undetected by plain radiographs.