Marfan Syndrome Panel

The Marfan syndrome panel at IntroLab analyzes 36 genes associated with Marfan syndrome and related disorders. Utilizing advanced NGS (Next-Generation Sequencing) technology, this panel accurately identifies mutations. The testing also includes genetic counseling, offering patients support and guidance based on the results.

What is Marfan syndrome?

Marfan Syndrome is a hereditary connective tissue disorder that affects multiple systems in the body, including the cardiovascular, musculoskeletal, ocular, respiratory, and central nervous systems. This syndrome can cause serious health issues, but early diagnosis and treatment can help manage symptoms and reduce the risk of complications.

Cause of Marfan syndrome

Marfan Syndrome is caused by a mutation in the FBN1 gene, which encodes the protein fibrillin-1, crucial for the structure of connective tissue. This mutation is inherited in an autosomal dominant pattern, meaning a child has a 50% chance of inheriting the disorder if one parent has Marfan Syndrome.

Who gets Marfan syndrome?

Marfan Syndrome can affect anyone, regardless of gender or ethnicity. It is an inherited disorder, so individuals with a parent who has Marfan Syndrome have a 50% chance of inheriting the condition. In some cases, Marfan Syndrome can also result from a new, spontaneous mutation in the FBN1 gene, even without a prior family history of the disorder.

Clinical presentation and symptoms

The symptoms of Marfan syndrome can vary widely in severity and typically include:

• Tall stature and long limbs: Individuals with Marfan syndrome often have unusually tall height, along with long arms, legs, and fingers.
• Joint hypermobility: Joints are often more flexible than normal, which can result in pain and injuries.
• Eye problems: Lens dislocation (ectopia lentis) and nearsightedness (myopia) are common, with an increased risk of developing glaucoma and cataracts.
• Chest deformities: These may include pectus excavatum (a sunken chest) or pectus carinatum (a protruding chest).
• Scoliosis: Spinal curvature can be present, leading to pain and reduced mobility.

Impact of Marfan syndrome on different body systems

Marfan Syndrome is a complex disorder that can affect multiple systems in the body, leading to various health issues.

Cardiovascular system

Marfan syndrome can have a significant impact on the cardiovascular system. The most serious concern is aortic dilation (enlargement of the aorta), which can result in aortic dissection, a medical emergency requiring immediate intervention. Additionally, heart valve problems may occur, leading to blood regurgitation.

Ocular system

Individuals with Marfan syndrome often have eye problems, such as lens dislocation and an increased risk of glaucoma and cataracts. These issues can significantly impact vision and require regular ophthalmologic check-ups.

Respiratory system

Respiratory issues may include pneumothorax (spontaneous lung collapse), which can cause chest pain and difficulty breathing. There is also a risk of sleep apnea due to abnormalities in the structure of the upper airways.

Central nervous system (CNS)

Dural ectasia, an enlargement of the spinal canal, can lead to back pain, headaches, and neurological symptoms. Managing this condition may require specialized care and treatment to alleviate pain and enhance quality of life.

Diagnosis of Marfan syndrome

Diagnosing Marfan syndrome involves a thorough clinical examination, assessment of family history, genetic testing, and specialized evaluations, such as an echocardiogram to assess the heart and aorta, as well as an eye exam to detect ocular issues.

The genetic panel analyzes 36 genes, including FBN1, which are linked to Marfan syndrome and related disorders. This test is conducted using a blood sample collected in an EDTA tube. The sample remains stable at room temperature without the need for additional preparation, facilitating easy transport and storage before analysis.

Sequencing and data analysis

Genetic sequencing, performed using NGS (Next Generation Sequencing), is one of the most advanced technologies in genetic testing. This method allows for a detailed analysis of genes at the molecular level, increasing diagnostic accuracy. NGS helps identify mutations responsible for Marfan syndrome, which is essential for determining risk and planning treatment.

IntroLab delivers results within 4 to 6 weeks. Along with the testing, IntroLab offers genetic counseling, providing patients and their families with expert guidance on the test results and options for further monitoring and treatment.

Test results for Marfan syndrome

Genetic test results for Marfan syndrome typically identify specific mutations in the FBN1 gene. A positive result indicates the presence of a mutation that causes Marfan syndrome, while a negative result may rule out the diagnosis or suggest further investigation if symptoms persist. These results help doctors assess the risk and plan appropriate treatment for the patient.

Treatment and monitoring

Treatment for Marfan syndrome is tailored to the specific symptoms and complications:

• Medications: Beta-blockers and other medications can help manage heart issues and reduce the risk of aortic dissection.
• Surgery: Surgery may be required to address aortic dilation or heart valve problems.
• Regular monitoring: Regular check-ups with a cardiologist, ophthalmologist, and orthopedist are essential for early detection and management of complications.

With proper monitoring and treatment, individuals with Marfan syndrome can lead a fulfilling life. However, significant issues with the aorta and heart can increase the risk of severe complications, making ongoing health monitoring essential.

Specialized genetic panels at IntroLab

In addition to the Marfan syndrome panel, IntroLab provides a range of other specialized genetic analysis panels:

• Autoinflammatory diseases panel
• Cardiomyopathy panel
• Arrhythmia panel
• Epilepsy panel
• Clinical exome sequencing
• Molecular karyotyping

Prenatal tests at IntroLab for early diagnosis

For expectant mothers, IntroLab offers prenatal tests that enable early detection of chromosomal and genetic disorders in the fetus.

• Prenatal BASIC Test
• Prenatal PLUS Test
• Prenatal EXPERT Test
• Prenatal PREMIUM Test
• Prenatal SPECIAL Test
• Prenatal SPECIAL + SMA Test

These tests are essential for providing accurate information about the fetus’s health and for making informed decisions during pregnancy.