ROSH Geriatrics Practice Test

Osteoarthritis is characterized by joint space narrowing and the formation of osteophytes, which are bony projections that develop along the edges of a bone. These changes are typically observed on imaging studies such as X-rays. In osteoarthritis, the degeneration of cartilage leads to a reduction in the space within the joint, while osteophytes form in response to the instability and stress at the joint. This condition often affects weight-bearing joints such as the knees and hips but can occur in any joint, contributing to pain, stiffness, and reduced mobility. The imaging findings of joint space narrowing and osteophyte formation are key diagnostic features that differentiate osteoarthritis from other types of arthritis, such as rheumatoid arthritis, which primarily involves synovial inflammation and may not show these specific structural changes prominently on imaging.