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What Is Subchondral Sclerosis?

By Aram Khayatpour ; Updated July 27, 2017

Subchondral sclerosis is a condition that affects the bones in the joints of people with osteoarthritis. It causes joint pain and immobility due increased bone mass and density in a thin layer of bone beneath the cartilage of joints. Though this condition is chronic and painful, it is easily detectable by a doctor and can be treated a number of ways.

Causes

Subchondral sclerosis is a result of another medical condition know as osteoarthritis. Osteoarthritis is the umbrella term for a group of diseases that cause the joints to slowly degrade over time. As the joints degrade they can cause permanent damage to the cartilage in them and the bones around them. Osteoarthritis is a common condition, usually found in older individuals, and is the No. 1 cause of chronic disability in the United States.

Features

Osteoarthritis will slowly degrade two main parts inside a joint. One of those parts is the cartilage, the spongy connective tissue, and the other part is the subchondral bone, which is a layer of bone just under the cartilage. When osteoarthritis wears away at this part of the body, the body attempts to regrow it, causing an increased density and thickness. This increased thickness in the subchondral layer is known as subchondral sclerosis.

Identification

Subchondral sclerosis is easy to identify with an X-ray, which shows subchondral sclerosis as a particularly white region along the line of a joint. The presence of subchondral sclerosis can also be used to identify a progressive stage of osteoarthritis itself.

Effects

Subchondral sclerosis is a painful condition that can lead to even more joint and bone damage. The extra dense bone can cause increased wear to the joint and inflammation of the area surrounding it. It can also cause bone spurs, which are small, acute bone growths that also cause increased damage and pain to the joint and any remaining cartilage in it. The pain, bone growth and joint damage that are associated with subchondral sclerosis can eventually lead to loss of motion in those joints.

Treatments

There is no cure for osteoarthritis, the overlying condition that causes subchondral sclerosis, but there are many treatment options designed to slow the damage caused and manage the pain of this condition. Many options involve lifestyle modification, meaning changes such as increased low-intensity workouts, weight loss and education. A number of medications are available, but most either treat the pain or reduce inflammation. Surgery is also an option, whether it is mild arthroscopic surgery to relieve some of the pain, or major joint replacement surgery to restore movement in a joint.

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