MASS syndrome: Difference between revisions

Revision as of 11:10, 15 February 2025

Overview

MASS syndrome is a connective tissue disorder that shares some features with Marfan syndrome, but is considered a distinct clinical entity. The acronym MASS stands for Mitral valve prolapse, Aortic root diameter at the upper limits of normal, Skeletal features, and Skin involvement. It is an autosomal dominant condition, meaning it is inherited in a pattern where only one copy of the altered gene is sufficient to cause the disorder.

File:Autosomal dominant - en.svg

Diagram showing autosomal dominant inheritance.

Clinical Features

Individuals with MASS syndrome may present with a variety of symptoms, which can include:

Mitral valve prolapse: A condition where the valve between the heart's left atrium and left ventricle doesn't close properly.
Aortic root diameter: The aorta may be slightly enlarged, but not to the extent seen in Marfan syndrome.
Skeletal features: These can include a tall stature, long limbs, and arachnodactyly (long, slender fingers).
Skin involvement: Skin may be hyperextensible and may show striae (stretch marks).

Genetics

MASS syndrome is caused by mutations in the FBN1 gene, which encodes the protein fibrillin-1. This protein is essential for the formation of elastic fibers found in connective tissue. The condition is inherited in an autosomal dominant manner, meaning a single copy of the mutated gene can cause the syndrome.

Diagnosis

Diagnosis of MASS syndrome is primarily clinical, based on the presence of the characteristic features. Genetic testing can confirm mutations in the FBN1 gene, but this is not always necessary for diagnosis.

Management

Management of MASS syndrome involves regular monitoring of the cardiovascular system, particularly the heart valves and aorta. Patients may require echocardiograms to assess the mitral valve and aortic root. Lifestyle modifications and medications may be recommended to manage symptoms and reduce the risk of complications.

Related Conditions

MASS syndrome is related to other connective tissue disorders, such as:

Related Pages

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-'''MASS syndrome''' is a medical condition that affects several parts of the body. The name MASS is an acronym that stands for the four main features of this condition: Mitral valve prolapse, Aortic enlargement, Skin and skeletal findings.
+{{DISPLAYTITLE:MASS Syndrome}}
-== Mitral valve prolapse ==
+== Overview ==
-[[Mitral valve prolapse]] (MVP) is a condition in which the heart's mitral valve doesn't work properly. The mitral valve is a small flap in the heart that prevents blood from flowing backward. In people with MVP, the valve bulges (prolapses) into the heart's left atrium during each heartbeat. This can lead to symptoms such as palpitations, shortness of breath, chest pain, and fatigue.
+'''MASS syndrome''' is a connective tissue disorder that shares some features with [[Marfan syndrome]], but is considered a distinct clinical entity. The acronym MASS stands for Mitral valve prolapse, Aortic root diameter at the upper limits of normal, Skeletal features, and Skin involvement. It is an [[autosomal dominant]] condition, meaning it is inherited in a pattern where only one copy of the altered gene is sufficient to cause the disorder.
-== Aortic enlargement ==
+[[File:Autosomal_dominant_-_en.svg|thumb|right|Diagram showing autosomal dominant inheritance.]]
-[[Aortic enlargement]] is a condition where the aorta, the main blood vessel that carries blood from the heart to the rest of the body, is larger than normal. This can increase the risk of an aortic aneurysm, a serious condition where the aorta can burst, causing life-threatening bleeding.
-== Skin and skeletal findings ==
+== Clinical Features ==
-People with MASS syndrome often have certain skin and skeletal abnormalities. These can include stretch marks, loose skin, and joint hypermobility. Joint hypermobility means that the joints can move beyond the normal range of motion, which can lead to joint pain and an increased risk of dislocations.
+Individuals with MASS syndrome may present with a variety of symptoms, which can include:
+* '''Mitral valve prolapse''': A condition where the valve between the heart's left atrium and left ventricle doesn't close properly.
+* '''Aortic root diameter''': The aorta may be slightly enlarged, but not to the extent seen in Marfan syndrome.
+* '''Skeletal features''': These can include a tall stature, long limbs, and arachnodactyly (long, slender fingers).
+* '''Skin involvement''': Skin may be hyperextensible and may show striae (stretch marks).
+== Genetics ==
+MASS syndrome is caused by mutations in the [[FBN1]] gene, which encodes the protein fibrillin-1. This protein is essential for the formation of elastic fibers found in connective tissue. The condition is inherited in an [[autosomal dominant]] manner, meaning a single copy of the mutated gene can cause the syndrome.
 == Diagnosis ==
-Diagnosis of MASS syndrome is based on the presence of the four main features of the condition. Genetic testing may also be used to confirm the diagnosis.
+Diagnosis of MASS syndrome is primarily clinical, based on the presence of the characteristic features. Genetic testing can confirm mutations in the [[FBN1]] gene, but this is not always necessary for diagnosis.
+== Management ==
+Management of MASS syndrome involves regular monitoring of the cardiovascular system, particularly the heart valves and aorta. Patients may require echocardiograms to assess the mitral valve and aortic root. Lifestyle modifications and medications may be recommended to manage symptoms and reduce the risk of complications.
-== Treatment ==
+== Related Conditions ==
-Treatment for MASS syndrome is focused on managing the symptoms and preventing complications. This can include medications to manage heart symptoms, physical therapy for joint issues, and regular monitoring of the aorta to detect any enlargement.
+MASS syndrome is related to other connective tissue disorders, such as:
-== See also ==
 * [[Marfan syndrome]]
+* [[Ehlers-Danlos syndrome]]
 * [[Loeys-Dietz syndrome]]
-* [[Ehlers-Danlos syndrome]]
-[[Category:Medical conditions]]
+== Related Pages ==
+* [[Connective tissue disease]]
+* [[Mitral valve prolapse]]
+* [[Aortic aneurysm]]
 [[Category:Genetic disorders]]
-[[Category:Cardiovascular diseases]]
+[[Category:Connective tissue diseases]]
-[[Category:Skin conditions]]
-[[Category:Skeletal disorders]]
-{{stub}}