The phrase ‘frozen shoulder’ is usually loosely utilised and wrongly attributed to other shoulder limitations for instance a rotator cuff tear or osteoarthritis. Subacromial pathology (e.g. rotator cuff tendinopathy, subacromial bursitis and impingement syndrome) can closely resemble frozen shoulder inside the early phases as well. PF is diagnosed according to https://www.theorthopaedicandpainpractice.com/pain-management-and-orthopaedic-care-what-you-need-to-know/