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CALCIFIC TENDINITIS OF THE SHOULDER

Calcific tendinitis of the shoulder

Calcific tendinitis of the shoulder, known medically as tendinosis calcarea, is a common degenerative and inflammatory condition of the shoulder tendons in which calcium crystals are deposited in the tendons of the rotator cuff. The tendon most often affected is the supraspinatus tendon, which runs above the humeral head beneath the acromion.

Depending on their size, position and stage, these calcium deposits irritate the surrounding tissue, cause inflammation of the bursa (bursitis subacromialis) and lead to pain that can be severe – particularly with overhead movements, when lying on the shoulder or under sudden load. In many cases the shoulder becomes considerably less mobile, in some cases to the point of a so-called "frozen shoulder".

The condition often runs in episodes and can last for weeks or months. Although calcific tendinitis can potentially resolve on its own, in its acute stage it frequently brings considerable restrictions at work and in everyday life.

How does calcific tendinitis develop?

How it develops

The exact cause is not yet fully understood, but it is thought that a reduced blood supply to the tendon, degenerative processes and metabolic changes all play a part.

Calcific tendinitis typically passes through three stages:

  • Formative stage – calcium is slowly deposited in the tendon
  • Resting stage – the deposit remains, but may cause no symptoms
  • Resorptive stage – the body begins to break the deposit down; this is usually when the pain is most severe

Symptoms

The symptoms of calcific tendinitis (tendinosis calcarea) vary with the stage of the condition and the extent of the calcium deposit. Some patients notice nothing for a long time – in other cases severe, at times barely bearable pain sets in suddenly. The acute inflammatory stage in particular, when the body is "dissolving" the calcium deposit, can provoke a marked reaction.

Pain

Typically shoulder pain that shoots in suddenly – often with no identifiable trigger – and becomes much worse with overhead movements

Restricted movement

Reduced mobility of the shoulder, sometimes with a protective posture or stiffening caused by the pain

Disturbed sleep

Disturbed sleep from peaks of pain at night, particularly when lying on the affected side

Treatment options

Treatment of calcific tendinitis depends on the stage of the condition, the extent of the symptoms and the size and position of the calcium deposit. One point is worth knowing: the calcification can resolve spontaneously, so the aim of treatment is primarily to relieve pain, preserve movement in the shoulder and support the body in resorbing the deposit itself.

In most cases no operation is needed – non-surgical measures often bring a clear improvement. Surgery is only worthwhile in persistent cases or where the deposit is mechanically blocking the joint.

Frequently asked questions about calcific tendinitis

Here you will find answers to the questions most often asked about calcific tendinitis and its treatment.

What exactly is calcific tendinitis of the shoulder?
Calcific tendinitis is a painful condition in which calcium crystals are deposited in the tendons of the rotator cuff – usually in the supraspinatus tendon. These deposits irritate the surrounding tissue and lead to inflammation, pain and restricted movement.
How do the calcium deposits form?
The exact cause has not been established conclusively. A reduced blood supply, degenerative processes in the tendon and metabolic changes that lead to calcification of the tendon tissue are all thought to be involved. Hormonal factors may also play a part.
Who is particularly affected?
Calcific tendinitis occurs most often in people between the ages of 30 and 60 – with no direct connection to physical work or sport. Women are affected somewhat more often than men.
Which symptoms are typical?
Sudden, stabbing pain in the shoulder, particularly with overhead movements or when lying on the affected side. In acute phases the pain can be very severe and restrict movement considerably.
How is the diagnosis made?
Alongside the clinical examination, the diagnosis is usually made with X-rays, on which the calcium deposit is visible. Ultrasound or an MRI scan can be added to assess inflammation or involvement of the bursa.
Can calcific tendinitis heal on its own?
Yes – in many cases the calcium deposit resolves spontaneously over time (the resorptive stage). The pain then subsides markedly. The aim of treatment is to support this stage and to relieve the symptoms.
Is an operation always necessary?
No. Surgical removal is only needed where the symptoms do not respond to treatment or where there are repeated episodes of inflammation. Most people manage without an operation.

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