Ataxia-Telangiectasia

What is Ataxia-Telangiectasia?

Ataxia-Telangiectasia is a rare inherited disorder that affects multiple body systems. The condition impacts the nervous system, immune system, and can lead to other health problems over time. It causes progressive difficulty with movement and coordination, along with weakened immune defenses.

The name comes from two main features of the condition. Ataxia refers to loss of coordination and balance that worsens as children grow. Telangiectasia means small, widened blood vessels that appear as red spots on the skin and eyes. These typically show up around age 5 or 6.

This condition is caused by changes in a specific gene that helps repair DNA damage in cells. When this gene does not work properly, cells throughout the body accumulate damage. This leads to the various symptoms people experience. The condition is passed down through families in an autosomal recessive pattern, meaning both parents must carry the gene change.

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Symptoms

Poor coordination and unsteady walking that starts in early childhood
Difficulty controlling eye movements
Slurred or slow speech
Small red spider veins on the whites of eyes and skin
Frequent infections including pneumonia and sinus infections
Delayed physical development
Difficulty swallowing
Muscle weakness and involuntary movements
Sensitivity to radiation exposure
Premature graying of hair

Symptoms typically begin when children start walking, between ages 1 and 4. Movement problems are usually the first sign parents notice. Immune system problems may not be obvious at first but become apparent through repeated infections.

Causes and risk factors

Ataxia-Telangiectasia is caused by mutations in the ATM gene. This gene provides instructions for making a protein that helps control cell division and repair damaged DNA. When the gene does not work correctly, cells cannot fix DNA breaks properly. This leads to cell death and problems in tissues that need frequent cell renewal, including the nervous system and immune system.

The condition is inherited in an autosomal recessive pattern. This means a child must inherit one defective copy of the gene from each parent to develop the condition. Parents who carry one copy of the mutated gene are called carriers and typically show no symptoms. When both parents are carriers, each child has a 25% chance of having the condition, a 50% chance of being a carrier, and a 25% chance of inheriting two normal genes.

How it's diagnosed

Diagnosis typically begins when parents or doctors notice coordination problems in early childhood. A complete medical history and physical examination help identify characteristic signs. Neurological examination reveals problems with balance, coordination, and eye movements. The presence of telangiectasia on the eyes and skin supports the diagnosis.

Blood tests play an important role in confirming the diagnosis. Immunoglobulin A levels are often low or absent in people with this condition. Lymphocyte counts and function tests show reduced T-lymphocytes and abnormal immune cell activity. These findings help distinguish this condition from other movement disorders. Genetic testing can confirm mutations in the ATM gene. Rite Aid offers blood testing that measures Immunoglobulin A and Lymphocytes, which can help identify immune system abnormalities associated with this condition.

Treatment options

Physical therapy to maintain mobility and muscle strength for as long as possible
Occupational therapy to help with daily living activities
Speech therapy for swallowing and communication difficulties
Immunoglobulin replacement therapy to reduce infection risk
Antibiotics to prevent and treat respiratory infections
Regular monitoring for cancer development
Avoidance of radiation exposure including unnecessary X-rays and CT scans
Nutritional support to maintain healthy weight and swallowing function
Assistive devices like wheelchairs or walkers as mobility declines
Pulmonary care to support breathing and prevent lung infections

Frequently asked questions

The first signs usually appear when children begin walking, typically between ages 1 and 4. Parents notice unsteady walking, poor balance, and difficulty with coordination. Children may fall frequently or have trouble controlling their movements. The characteristic red spider veins on the eyes usually appear later, around age 5 or 6.

Yes, this is an inherited genetic condition passed down through families. It is caused by mutations in the ATM gene and follows an autosomal recessive pattern. This means both parents must carry the gene mutation for a child to develop the condition. Genetic counseling can help families understand their risk.

Blood tests provide important diagnostic clues for this condition. Tests measuring Immunoglobulin A often show low or absent levels in affected individuals. Lymphocyte counts reveal reduced T-lymphocytes and abnormal immune function. These findings, combined with clinical symptoms and genetic testing, help confirm the diagnosis.

This condition causes progressive weakening of the immune system over time. People develop low levels of antibodies, especially Immunoglobulin A, which protects against infections. T-lymphocyte numbers decrease and do not work properly. This makes people more susceptible to repeated respiratory and sinus infections throughout their lives.

Life expectancy varies considerably depending on the severity of symptoms and complications. Many people with this condition live into their 20s or 30s. Respiratory infections and lung disease are common causes of serious health problems. Some individuals with milder symptoms may live longer with proper medical care and monitoring.

People with Ataxia-Telangiectasia are extremely sensitive to radiation because their cells cannot repair DNA damage properly. Even normal amounts of radiation from medical imaging can cause significant harm. They have a much higher risk of developing cancer from radiation exposure. Doctors should avoid X-rays and CT scans whenever possible and use alternative imaging methods.

There is currently no cure for this genetic condition. Treatment focuses on managing symptoms and preventing complications. Physical therapy helps maintain movement abilities. Antibiotics and immunoglobulin therapy reduce infection risk. Research continues into potential therapies, but current care aims to improve quality of life and extend survival.

Regular blood monitoring is important to track immune function and watch for complications. Most doctors recommend blood tests every 3 to 6 months to check antibody levels and lymphocyte counts. More frequent testing may be needed during illness or if problems develop. Monitoring helps doctors adjust treatment and catch issues early.

Respiratory infections are the most frequent and serious problem. These include pneumonia, bronchitis, and sinus infections that occur repeatedly. Ear infections are also common, especially in children. The weakened immune system makes it harder to fight off bacteria and some viruses. Preventive antibiotics and immunoglobulin therapy help reduce infection frequency.

Carriers who have one copy of the mutated gene typically do not develop symptoms of the condition. However, research suggests carriers may have a slightly increased risk of certain cancers, particularly breast cancer in women. Carriers should discuss appropriate cancer screening with their doctors. Genetic counseling helps carriers understand risks for their children.