ICD codes for this disease: ICD codes are internationally valid medical diagnosis codes. They are found e.g. in medical reports or on incapacity certificates. Q87ArtikelübersichtMarfan syndrome
- Causes and risk factors
- Examinations and diagnosis
- Disease course and prognosis
Marfan syndrome: description
Marfan syndrome is a genetic disease that is either transmitted from the parent to the child or occurs spontaneously. A spontaneously arising disease is also called a sporadic disease. This is true for about 25 to 30 percent of Marfan syndrome patients. Overall, one to five out of every 10,000 people in the population are affected by Marfan syndrome. There is no difference between the sexes.To the table of contents
Marfan syndrome: symptoms
The Marfan syndrome signs are very different and different degrees pronounced in individual patients. Even in the same family, the symptoms of Marfan syndrome can be very different in the affected family members. The disease affects various organ systems. Most common are changes in the
- Cardiovascular system
Marfan syndrome: cardiovascular system
Patients with Marfan syndrome are at an increased risk of sudden death. The reason for this is a frequently occurring tear in the wall of the main artery (aortic dissection). By forming a gap within the aortic wall, the blood is no longer transported into the smaller blood vessels, but seeps into the gaps. The risk of aortic dissection is increased in Marfan syndrome patients because their wall-weakened aorta progressively expands (progressive aortic dilatation).
In addition, patients often suffer from damage to the heart valves such as aortic valve and mitral valve insufficiency. These can lead to cardiac arrhythmia. Furthermore, they are at risk of developing inflammation of the heart (endocarditis) and heart failure.
Marfan syndrome: skeleton
Skeletal changes are often the first sign of Marfan syndrome. The patients are characterized by a tall growth and very narrow, long extremities. The Spinnenfingrigkeit (arachnodactyly) is a well-known symptom. The spider fingers are referred to as such because they are extremely long and narrow.
In addition, many patients have thoracic deformities such as a chicken or funnel chest. As other skeletal changes they often suffer from scoliosis, a bending and twisting of the spine. In addition, some patients have underdeveloped facial bones, such as the zygoma or upper jaw.
The totality of these skeletal changes is also called marfanoid habitus.
Marfan syndrome: eye
The changes in the eye due to Marfan syndrome mainly affect the lens. It is often relocated (lens ectopia). This threatens the patient blindness. Another risk factor for blindness is myopia. It is caused by a too long eyeball. This change can also lead to retinal detachment.
Marfan syndrome: symptoms on other organs
Marfan syndrome can damage other structures in addition to the organ systems mentioned. This includes, among other things, the lungs. Those affected are at an increased risk of suffering from pneumothorax. By this, physicians understand the separation of the lung fur from the pleura and the ingress of air into this gap. This condition can be life-threatening as the lung collapses in the appropriate area.
On the skin of patients with Marfan syndrome, one often sees stretch marks as signs of weak connective tissue.
In the course of life, a so-called Duraektasie can form. This is an extension of the meninges, usually at the level of the lumbar spine. It is often symptomless. In some cases, it can cause pain when the durasack presses on the spinal cord nerves.To the table of contents
Marfan syndrome: causes and risk factors
Marfan syndrome is an autosomal dominant hereditary disease. This means that there is a change (mutation) on one gene of our genetic material that triggers the disease. Autosomal dominant describes that this genetic information is on a non-gender-specific gene complex (autosomal) and always appears in appearance (dominant).
If a patient with Marfan syndrome has a child, they can either inherit the diseased or the healthy gene. Because every human being has a double set of hereditary factors. This means that the transmission probability is 50 percent. A child of a Marfan syndrome patient thus has a disease probability of 50 percent.
Marfan syndrome: damaged connective tissue
The mutation that causes Marfan syndrome lies on the long arm of chromosome 15 (15q21). It affects the so-called FBN1 gene. This gene is responsible for the formation of a connective tissue protein called fibrillin-1. Fibrillin-1 is important for the stability of the connective tissue. If its formation is limited by the mutation, the connective tissue loses stability.
Marfan syndrome: Different expression
The degree of manifestation of Marfan syndrome varies. Physicians then speak of variable expressivity. This means that the symptoms of the patients are different even within a family. Despite the same mutation, one patient may have few symptoms, while a sibling shows the full picture of Marfan syndrome.To the table of contents
Marfan syndrome: examinations and diagnosis
The diagnosis Marfan syndrome is often made by a pediatrician. Overall, various specialists play a role in diagnostics, treatment and counseling. These include the pediatrician, human geneticist, cardiologist, orthopedist and ophthalmologist. Before the diagnosis is finalized, your doctor will first ask you in detail about your medical history (anamnesis). For this he asks you the following possible questions:
- Is a family member suffering from Marfan syndrome?
- Do you have the feeling of racing heart every now and then?
- Have you always been taller than others in your childhood?
- Are you short-sighted?