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Background Sonography is a useful imaging tool for the examination of musculoskeletal pathology. There are many advantages to this technique, including easy accessibility, low cost, comparison with the asymptomatic limb, and patient comfort. Unlike other available modalities, dynamic assessment is readily performed using sonography. Furthermore, the use of Doppler technique allows assessment of vascularity, inflammation, and anatomical relationships of the structure in question to adjacent vessels. Aim of Study This study investigates the value of dynamic ultrasound in the evaluation of AC and SC joints abnormality in comparison with the asymptomatic limb. Patients &amp; Methods This prospective study included fifty cases, thirty patients were clinically positive for shoulder pain. Twenty healthy persons examined as control group. The patients were referred from Rheumatology and Immunology Department of Ain Shams University.US evaluation was performed at the Radiology Department of Ain –Shams University Hospital in period from January to June2018, to characterizing the AC and SC joints, their pathogenesis and sequelae. Dynamic US examination was also performed in all the cases. Results This study included 30 patients. The most common presenting symptoms in the primary care were shoulder pain which present in all 30 patients. Appropriate history and physical examination coupled with correct radiographs usually lead to an accurate diagnosis, we add that dynamic US which served a role in directing the management plan in 18 patients, this further confirmed with a positive clinical examination, in contrast to the other 12 patients for whom there was negative clinical findings. Conclusion High-resolution US technology, coupled with good anatomical knowledge and proper technique, has become valuable in the assessment of ACJ pathology as can be a useful initial diagnostic modality in SCJ osteoarthritis. Using US as a first line investigative tool can eliminate the need for further more expensive investigation like CT/ MRI and serve as a guide for further imaging and management.

The Role of Dynamic Ultrasound in the Assessment of the Pathological Changes of Acromioclavicular and Sternoclavicular Joints