What radiological sign is indicative of adhesive capsulitis?

The identification of adhesive capsulitis, commonly known as frozen shoulder, is often associated with the loss of the subacromial space in radiological evaluations. This condition involves inflammation and thickening of the shoulder joint capsule, which restricts movement and can lead to a narrowing of the space between the humeral head and the acromion, specifically within the subacromial region.

As the condition progresses, the glenohumeral joint tends to become less mobile, exacerbating the stiffness and leading to this observable phenomenon on imaging, where one can see the loss of this crucial subacromial space. This is indicative of the pathological changes in the shoulder structure associated with adhesive capsulitis, highlighting the importance of recognizing such a radiological sign for proper diagnosis and management.