what causes sclerosis of the sacroiliac joint
You have two sacroiliac joints, one on the left side and one on the right side of the back part of the pelvis just below the belt line at the upper area of the buttocks. The â¦ sacroiliac joint is where the sacrum (tailbone) connects with the ilium (hip bone) to make a slightly moveable joint. MS is a disease affecting the brain and the spinal cord while PBA is a neurologiâ¦. 2  Diagnosing Arthritis in the Sacroiliac Joint Arthritis in the sacroiliac joint can cause pain, stiffness, limited mobility and a decrease in your range of motion. 3  Other manifestations of arthritis in the sacroiliac joinâ¦.