What Is Calcinosis?

Calcinosis is a condition that occurs when calcium deposits build up abnormally in the body’s soft tissues, organs, blood vessels, or skin. Unlike healthy calcium that strengthens bones and teeth, these deposits form in places where calcium does not normally belong. Over time, calcinosis can interfere with normal body function and may cause pain, inflammation, stiffness, or damage to affected tissues.

In rare diseases such as Generalized Arterial Calcification of Infancy (GACI), ENPP1 Deficiency, and related calcification disorders, calcinosis is linked to problems with the body’s ability to regulate mineral balance. These conditions can lead to widespread abnormal calcification throughout the body, including calcification in organs and connective tissues.

What Causes Calcinosis?

Calcinosis develops when calcium and phosphate levels become improperly regulated or when the body loses its ability to prevent abnormal mineral deposits. In people with GACI and related genetic conditions, low levels of pyrophosphate play a major role.

Pyrophosphate is a naturally occurring substance that helps stop calcium from depositing in soft tissues and blood vessels. When pyrophosphate levels are reduced, calcium buildup can occur in areas such as:

• Blood vessels
• Kidneys
• Heart tissue
• Skin
• Muscles
• Tendons and ligaments
• Internal organs

This abnormal calcification process may worsen over time and can contribute to complications affecting mobility, circulation, and organ function.

Symptoms of Calcification in Organs and Tissues

Symptoms of calcinosis vary depending on where calcium deposits form and how severe the buildup becomes.

Common symptoms may include:

• Pain or tenderness
• Swelling
• Joint stiffness
• Limited mobility
• Skin nodules or hard lumps
• Muscle discomfort
• Fatigue
• Organ related complications

In more severe cases, calcification in organs may affect cardiovascular health, kidney function, or respiratory function.

Calcinosis in GACI and Related Conditions

Calcinosis is an important feature of several rare mineralization disorders, including GACI, ENPP1 Deficiency, and ABCC6 Deficiency. While GACI is most commonly associated with calcification of the arteries, patients may also experience abnormal calcium deposits in other tissues throughout the body.

Researchers continue to study how genetic mutations disrupt the body’s natural defenses against calcification and how targeted therapies may help reduce disease progression.

Diagnosis and Management

Doctors may diagnose calcinosis using imaging tests such as X rays, CT scans, ultrasounds, or MRI scans. Bloodwork and genetic testing may also help identify underlying rare diseases associated with abnormal calcification.

Treatment often focuses on managing symptoms, monitoring disease progression, and supporting affected organs and tissues. Ongoing research into therapies for rare calcification disorders continues to offer hope for improved treatment options in the future.

To learn more about rare calcification disorders, visit our Glossary, FAQ, and educational resource pages for additional support and information.