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Shoulder Pain
Calcific tendinitis is a painful shoulder condition due to the deposition of calcium hydroxyapatite crystals within the rotator cuff tendons. There is associated inflammation of the subacromial bursa that also contributes to the pain. The most common location is the supraspinatus tendon in the rotator cuff of the shoulder, though they can appear in any tendon location. Typically, the age of onset is around 30–60 years, with a slight predilection for women.
Symptoms of acute calcific tendinitis can be very severe; they usually manifest abruptly without any rhyme or reason. Patients are reluctant to move their shoulder and typically present to A&E due to the severity of symptoms.
We are unsure; the exact pathophysiology is complex and still debated, with no clear consensus as to its exact cause. The article in the source below identifies 4 different potential pathogenic mechanisms and, if of interest, can be accessed for more information.Source: Hydroxyapatite Deposition Disease: A Comprehensive Review of Pathogenesis, Radiological Findings, and Treatment Strategies – PubMed (opens in a new tab)
Research has shown an increased risk of developing the disease in patients with metabolic health issues such as diabetes, hyperlipidaemia, hypertension and hypothyroidism. There is a hypothesised genetic factor as well with a link to the HLA-A1 genotype.Source: Hydroxyapatite Deposition Disease: A Comprehensive Review of Pathogenesis, Radiological Findings, and Treatment Strategies – PubMed (opens in a new tab)
Clinically the nature and history of your symptoms can give a clue to the likely presence of this disease. It will be confirmed with imaging. Calcifications of the rotator cuff can be seen on plain film X-ray. They are, however, often better evaluated on ultrasound, which is more sensitive at seeing smaller and less mature-appearing calcifications. It can also evaluate for any concurrent rotator cuff pathology, such as rotator cuff tears and bursitis. MRI can do the same but can be less sensitive than ultrasound in detecting calcifications.
In some patients there can be spontaneous resolution; again, why this happens in some patients but not in others we are unsure. It is also widely accepted that calcifications can be asymptomatic, meaning they can be present in shoulders of patients without pain.
If symptoms are progressive and you have been diagnosed with symptomatic calcific tendinitis, then you have treatment options. These include:
Despite this, a very small proportion of patients will still have residual symptoms even following surgery.
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