What is ankylosis of the sacroiliac joint?

Ankylosis of the sacroiliac joint, also known as sacroiliac joint fusion or sacroiliac joint arthritis, is a condition characterized by the inflammation and fusion of the sacroiliac joint, which connects the sacrum to the pelvis. It is a chronic, degenerative condition that can cause significant pain and stiffness in the lower back and pelvis.

Ankylosis of the sacroiliac joint can be caused by a variety of factors, including:

- Degenerative changes: Over time, the cartilage that cushions the sacroiliac joint can wear down, leading to inflammation and the formation of bone spurs. These bone spurs can fuse the sacroiliac joint, resulting in ankylosis.

- Inflammatory diseases: Certain inflammatory diseases, such as rheumatoid arthritis, ankylosing spondylitis, and psoriatic arthritis, can affect the sacroiliac joint and cause ankylosis.

- Infection: Infections in the sacroiliac joint can also lead to inflammation and ankylosis.

- Trauma: Injuries to the sacroiliac joint, such as fractures, can also lead to ankylosis.

Symptoms of ankylosis of the sacroiliac joint can include:

- Pain in the lower back, buttocks, and hips

- Stiffness in the lower back and pelvis

- Difficulty walking, standing, and sitting

- Pain that worsens with activity and improves with rest

- Pain that is worse on one side of the body

Treatment for ankylosis of the sacroiliac joint typically involves medication, physical therapy, and lifestyle modifications. In some cases, surgery may be necessary to relieve pain and improve function.