MSKMRI on Instagram: "📌 Os Acromiale: Clinical Significance, Imaging, and Management 1. Importance of Identifying Os Acromiale Os acromiale can contribute to shoulder impingement symptoms due to inferior displacement with deltoid contraction. It may serve as a contraindication to subacromial decompression surgery in cases of clinical impingement. Movement of the os acromiale can lead to osteophyte formation, which impinges on the subacromial space, but symptoms typically arise in middle age. De