Tenosynovitis is the inflammation of the fluid-filled sheath (called the synovium) that surrounds a tendon, typically leading to joint pain, swelling, and stiffness. Tenosynovitis can be either infectious or non infectious. Common clinical manifestations of noninfectious tenosynovitis include de Quervain tendinopathy and stenosing tenosynovitis (more commonly known as trigger finger)


The synovium is a lining of the protective sheath that covers tendons. Tenosynovitis is inflammation of this sheath. The cause of the inflammation may be unknown, or it may result from:

Diseases that cause inflammation

  • Infection
  • Injury
  • Overuse
  • Strain

The wrists, hands, ankles, and feet are commonly affected because the tendons are long across those joints. But, the condition may occur with any tendon sheath.

An infected cut to the hands or wrists that causes infectious tenosynovitis may be an emergency requiring surgery.


The most common symptoms of tenosynovitis include:

  • Pain.
  • Swelling at a joint.
  • Difficulty moving a part of your body like you usually can.
  • Pain when moving a part of your body.
  • Discoloration in a straight line along a tendon.


After a physical exam, you might need at least one of a few imaging tests:

  • X-rays: An X-ray can show if your synovial membrane has hardened and other signs of inflammation.
  • Magnetic Resonance Imaging (MRI): Your provider might use an MRI to get a complete picture of your tendon and the area around it.
  • Ultrasound: An ultrasound is like an X-ray for soft tissue. Your provider can use it to take pictures of the area around your tendon that will show any inflammation.
  • CT scan: A CT scan will give your provider a more detailed picture of your tendon and the surrounding tissue than an X-ray.

The diseases under diagnostic codes 5013 through 5024 Will be rated on limita­tion of motion of affected parts, as arthritis, degenerative, except gout which will be rated under diagnostic code 5002.

This condition will be rated on limitation of motion of affected body part.

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