Glenohumeral Joint Osteoarthritis of the Shoulder
Glenohumeral joint osteoarthritis, also known as shoulder osteoarthritis, is a degenerative joint disease that affects the cartilage in the shoulder joint. The glenohumeral joint is the main joint of the shoulder, where the head of the upper arm bone (humerus) meets the shoulder blade (scapula). Osteoarthritis occurs when the protective cartilage that cushions the ends of the bones wears down over time, leading to pain, stiffness, and reduced mobility in the shoulder joint.