What is Arterial Tortuosity Syndrome

Arterial Tortuosity Syndrome is an ultra-rare genetic connective tissue disorder characterized by the elongation and twisting (tortuosity) of the major arteries, including the aorta. It is caused by mutations in the SLC2A10 gene and requires lifelong specialized monitoring by cardiovascular experts to manage risks like arterial stenosis or aneurysm formation.

What causes Arterial Tortuosity Syndrome?

Arterial Tortuosity Syndrome is caused by a mutation in the SLC2A10 gene, which provides instructions for making a protein that helps regulate the structure and function of elastic fibers in arterial walls. When this gene is mutated, the connective tissue lacks the necessary resilience, causing the arteries to become abnormally long and coiled. This condition is inherited in an autosomal recessive pattern, meaning an individual must inherit one faulty copy of the gene from each parent to be affected.

How does Arterial Tortuosity Syndrome affect the body?

The primary impact of Arterial Tortuosity Syndrome involves the cardiovascular system, but it also presents with distinct physical features. Clinical manifestations often include:

• Cardiovascular: Severe tortuosity, stenosis (narrowing), and potential aneurysms of the pulmonary arteries and the aorta.


• Dermatological: Soft, hyperextensible skin and easy bruising.


• Skeletal: Joint hypermobility, arachnodactyly (long, slender fingers), and chest wall deformities such as pectus excavatum.


• Craniofacial: A high-arched palate, micrognathia (small jaw), and down-slanting palpebral fissures.

How common is Arterial Tortuosity Syndrome?

Arterial Tortuosity Syndrome is extremely rare, with fewer than 100 cases reported in medical literature worldwide. Because it is so rare, the true prevalence remains unknown, and it is likely underdiagnosed. At DiseaseMaps.org, 7 people with Arterial Tortuosity Syndrome have joined our community to share their experiences and support others navigating this diagnosis.

What differentiates this from other connective tissue disorders?

While Arterial Tortuosity Syndrome shares some overlapping features with Marfan syndrome or Loeys-Dietz syndrome, it is genetically and clinically distinct. The hallmark of Arterial Tortuosity Syndrome is the extensive, widespread "corkscrew" appearance of the arteries across the entire body, rather than being localized to just one area. Unlike some other connective tissue disorders, the inheritance pattern is strictly autosomal recessive.

Next steps

• Consult with a board-certified clinical geneticist to confirm a diagnosis through molecular testing.


• Schedule regular follow-ups with a pediatric or adult cardiologist specializing in connective tissue disorders.


• Join the DiseaseMaps.org community to connect with other families affected by Arterial Tortuosity Syndrome.


• Request screenings for arterial imaging (MRI or CT angiography) to establish a baseline for cardiovascular health.

Medical disclaimer: This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment; always seek the guidance of a qualified healthcare provider.

References

• Orphanet: Arterial Tortuosity Syndrome (ORPHA:93928)


• NIH Genetic and Rare Diseases Information Center (GARD): Arterial Tortuosity Syndrome


• OMIM (Online Mendelian Inheritance in Man): #208050 Arterial Tortuosity Syndrome


• The Marfan Foundation (Resource for connective tissue disorders)