Rotator Cuff Arthropathy
Rotator cuff arthropathy is an advanced shoulder condition in which a massive, long-standing rotator cuff tear leads to progressive degeneration of the glenohumeral joint. Without the rotator cuff's stabilizing function, the humeral head migrates superiorly, eroding the undersurface of the acromion and causing the joint cartilage to break down. This combination of tendon insufficiency and arthritis creates a unique pattern of destruction that requires specialized treatment.
How It Develops
Rotator cuff arthropathy typically affects older patients who have had a large or massive rotator cuff tear — often unrecognized or undertreated — for many years. As the torn tendons retract and the muscle tissue becomes infiltrated with fat, the mechanical environment of the shoulder deteriorates. The resulting abnormal joint contact patterns accelerate cartilage wear and eventually lead to collapse of the joint architecture.
Symptoms
Patients experience severe shoulder pain, profound weakness, and dramatically limited range of motion — particularly difficulty elevating the arm above shoulder height (pseudoparalysis). The shoulder may appear visibly abnormal, with prominent bone changes palpable beneath the skin. Night pain and pain at rest are common in advanced cases.
Diagnosis
X-rays demonstrate the characteristic superior migration of the humeral head, loss of the acromiohumeral interval, and arthritic changes in the glenohumeral joint. MRI or CT scan further characterizes the extent of tendon loss, muscle fatty infiltration, and glenoid bone stock — critical information for pre-operative planning.
Treatment: Reverse Total Shoulder Arthroplasty
Rotator cuff arthropathy is the primary indication for reverse total shoulder arthroplasty (rTSA). Unlike a conventional shoulder replacement, which relies on an intact rotator cuff, rTSA switches the position of the ball and socket — placing a metal ball on the glenoid side and a socket on the humeral side. This geometry shifts the biomechanical center of rotation, allowing the deltoid muscle to compensate for the absent rotator cuff and restore meaningful shoulder elevation.
Reverse shoulder replacement reliably reduces pain and significantly improves function in patients with rotator cuff arthropathy, even in those with severe pseudoparalysis. Dr. Cooper performs rTSA with advanced implant systems and surgical techniques designed to maximize stability, range of motion, and implant longevity.
