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1.

Marfan syndrome

Marfan syndrome is a systemic disorder of connective tissue with a high degree of clinical variability. Cardinal manifestations involve the ocular, skeletal, and cardiovascular systems. FBN1 pathogenic variants associate with a broad phenotypic continuum, ranging from isolated features of Marfan syndrome to neonatal presentation of severe and rapidly progressive disease in multiple organ systems. Myopia is the most common ocular feature; displacement of the lens from the center of the pupil, seen in approximately 60% of affected individuals, is a hallmark feature. People with Marfan syndrome are at increased risk for retinal detachment, glaucoma, and early cataract formation. The skeletal system involvement is characterized by bone overgrowth and joint laxity. The extremities are disproportionately long for the size of the trunk (dolichostenomelia). Overgrowth of the ribs can push the sternum in (pectus excavatum) or out (pectus carinatum). Scoliosis is common and can be mild or severe and progressive. The major sources of morbidity and early mortality in the Marfan syndrome relate to the cardiovascular system. Cardiovascular manifestations include dilatation of the aorta at the level of the sinuses of Valsalva, a predisposition for aortic tear and rupture, mitral valve prolapse with or without regurgitation, tricuspid valve prolapse, and enlargement of the proximal pulmonary artery. With proper management, the life expectancy of someone with Marfan syndrome approximates that of the general population. [from GeneReviews]

2.

Loeys-Dietz syndrome 2

Loeys-Dietz syndrome (LDS) is characterized by vascular findings (cerebral, thoracic, and abdominal arterial aneurysms and/or dissections) and skeletal manifestations (pectus excavatum or pectus carinatum, scoliosis, joint laxity, arachnodactyly, talipes equinovarus). Approximately 75% of affected individuals have LDS type I with craniofacial manifestations (widely spaced eyes, bifid uvula/cleft palate, craniosynostosis); approximately 25% have LDS type II with systemic manifestations of LDSI but minimal or absent craniofacial features. LDSI and LDSII form a clinical continuum. The natural history of LDS is characterized by aggressive arterial aneurysms (mean age at death 26.1 years) and a high incidence of pregnancy-related complications, including death and uterine rupture. [from GeneReviews]

3.

Aortic aneurysm, familial thoracic 6

Familial thoracic aortic aneurysm and dissection (familial TAAD) involves problems with the aorta, which is the large blood vessel that distributes blood from the heart to the rest of the body. Familial TAAD affects the upper part of the aorta, near the heart. This part of the aorta is called the thoracic aorta because it is located in the chest (thorax). Other vessels that carry blood from the heart to the rest of the body (arteries) can also be affected.In familial TAAD, the aorta can become weakened and stretched (aortic dilatation), which can lead to a bulge in the blood vessel wall (an aneurysm). Aortic dilatation may also lead to a sudden tearing of the layers in the aorta wall (aortic dissection), allowing blood to flow abnormally between the layers. These aortic abnormalities are potentially life-threatening because they can decrease blood flow to other parts of the body such ... as the brain or other vital organs, or cause the aorta to break open (rupture).The occurrence and timing of these aortic abnormalities vary, even within the same affected family. They can begin in childhood or not occur until late in life. Aortic dilatation is generally the first feature of familial TAAD to develop, although in some affected individuals dissection occurs with little or no aortic dilatation.Aortic aneurysms usually have no symptoms. However, depending on the size, growth rate, and location of these abnormalities, they can cause pain in the jaw, neck, chest, or back; swelling in the arms, neck, or head; difficult or painful swallowing; hoarseness; shortness of breath; wheezing; a chronic cough; or coughing up blood. Aortic dissections usually cause severe, sudden chest or back pain, and may also result in unusually pale skin (pallor), a very faint pulse, numbness or tingling (paresthesias) in one or more limbs, or paralysis.Familial TAAD may not be associated with other signs and symptoms. However, some individuals in affected families show mild features of related conditions called Marfan syndrome or Loeys-Dietz syndrome. These features include tall stature, stretch marks on the skin, an unusually large range of joint movement (joint hypermobility), and either a sunken or protruding chest. Occasionally, people with familial TAAD develop aneurysms in the brain or in the section of the aorta located in the abdomen (abdominal aorta). Some people with familial TAAD have heart abnormalities that are present from birth (congenital). Affected individuals may also have a soft out-pouching in the lower abdomen (inguinal hernia), an abnormal curvature of the spine (scoliosis), or a purplish skin discoloration (livedo reticularis) caused by abnormalities in the tiny blood vessels of the skin (dermal capillaries). However, these conditions are also common in the general population. Depending on the genetic cause of familial TAAD in particular families, they may have an increased risk of developing blockages in smaller arteries, which can lead to heart attack and stroke. [from GHR] more

4.

Aortic aneurysm, familial thoracic 4

Familial thoracic aortic aneurysm and dissection (familial TAAD) involves problems with the aorta, which is the large blood vessel that distributes blood from the heart to the rest of the body. Familial TAAD affects the upper part of the aorta, near the heart. This part of the aorta is called the thoracic aorta because it is located in the chest (thorax). Other vessels that carry blood from the heart to the rest of the body (arteries) can also be affected.In familial TAAD, the aorta can become weakened and stretched (aortic dilatation), which can lead to a bulge in the blood vessel wall (an aneurysm). Aortic dilatation may also lead to a sudden tearing of the layers in the aorta wall (aortic dissection), allowing blood to flow abnormally between the layers. These aortic abnormalities are potentially life-threatening because they can decrease blood flow to other parts of the body such ... as the brain or other vital organs, or cause the aorta to break open (rupture).The occurrence and timing of these aortic abnormalities vary, even within the same affected family. They can begin in childhood or not occur until late in life. Aortic dilatation is generally the first feature of familial TAAD to develop, although in some affected individuals dissection occurs with little or no aortic dilatation.Aortic aneurysms usually have no symptoms. However, depending on the size, growth rate, and location of these abnormalities, they can cause pain in the jaw, neck, chest, or back; swelling in the arms, neck, or head; difficult or painful swallowing; hoarseness; shortness of breath; wheezing; a chronic cough; or coughing up blood. Aortic dissections usually cause severe, sudden chest or back pain, and may also result in unusually pale skin (pallor), a very faint pulse, numbness or tingling (paresthesias) in one or more limbs, or paralysis.Familial TAAD may not be associated with other signs and symptoms. However, some individuals in affected families show mild features of related conditions called Marfan syndrome or Loeys-Dietz syndrome. These features include tall stature, stretch marks on the skin, an unusually large range of joint movement (joint hypermobility), and either a sunken or protruding chest. Occasionally, people with familial TAAD develop aneurysms in the brain or in the section of the aorta located in the abdomen (abdominal aorta). Some people with familial TAAD have heart abnormalities that are present from birth (congenital). Affected individuals may also have a soft out-pouching in the lower abdomen (inguinal hernia), an abnormal curvature of the spine (scoliosis), or a purplish skin discoloration (livedo reticularis) caused by abnormalities in the tiny blood vessels of the skin (dermal capillaries). However, these conditions are also common in the general population. Depending on the genetic cause of familial TAAD in particular families, they may have an increased risk of developing blockages in smaller arteries, which can lead to heart attack and stroke. [from GHR] more

5.

Ectopia lentis, isolated, autosomal dominant

Ectopia lentis is defined as an abnormal stretching of the zonular fibers that leads to lens dislocation, resulting in acute or chronic visual impairment (Greene et al., 2010). Citing the revised Ghent criteria for Marfan syndrome, Loeys et al. (2010) proposed the designation 'ectopia lentis syndrome' (ELS) for patients with ectopia lentis and a mutation in the FBN1 gene who lack aortic involvement, to highlight the systemic nature of the condition and to emphasize the need for assessment of features outside the ocular system (see DIAGNOSIS). Genetic Heterogeneity of Isolated Ectopia Lentis An autosomal recessive form of isolated ectopia lentis (ECTOL2; 225100) is caused by mutation in the ADAMTSL4 gene (610113). [from OMIM]

6.

Thoracic aortic aneurysm and aortic dissection

Familial thoracic aortic aneurysm and dissection (familial TAAD) involves problems with the aorta, which is the large blood vessel that distributes blood from the heart to the rest of the body. Familial TAAD affects the upper part of the aorta, near the heart. This part of the aorta is called the thoracic aorta because it is located in the chest (thorax). Other vessels that carry blood from the heart to the rest of the body (arteries) can also be affected.In familial TAAD, the aorta can become weakened and stretched (aortic dilatation), which can lead to a bulge in the blood vessel wall (an aneurysm). Aortic dilatation may also lead to a sudden tearing of the layers in the aorta wall (aortic dissection), allowing blood to flow abnormally between the layers. These aortic abnormalities are potentially life-threatening because they can decrease blood flow to other parts of the body such ... as the brain or other vital organs, or cause the aorta to break open (rupture).The occurrence and timing of these aortic abnormalities vary, even within the same affected family. They can begin in childhood or not occur until late in life. Aortic dilatation is generally the first feature of familial TAAD to develop, although in some affected individuals dissection occurs with little or no aortic dilatation.Aortic aneurysms usually have no symptoms. However, depending on the size, growth rate, and location of these abnormalities, they can cause pain in the jaw, neck, chest, or back; swelling in the arms, neck, or head; difficult or painful swallowing; hoarseness; shortness of breath; wheezing; a chronic cough; or coughing up blood. Aortic dissections usually cause severe, sudden chest or back pain, and may also result in unusually pale skin (pallor), a very faint pulse, numbness or tingling (paresthesias) in one or more limbs, or paralysis.Familial TAAD may not be associated with other signs and symptoms. However, some individuals in affected families show mild features of related conditions called Marfan syndrome or Loeys-Dietz syndrome. These features include tall stature, stretch marks on the skin, an unusually large range of joint movement (joint hypermobility), and either a sunken or protruding chest. Occasionally, people with familial TAAD develop aneurysms in the brain or in the section of the aorta located in the abdomen (abdominal aorta). Some people with familial TAAD have heart abnormalities that are present from birth (congenital). Affected individuals may also have a soft out-pouching in the lower abdomen (inguinal hernia), an abnormal curvature of the spine (scoliosis), or a purplish skin discoloration (livedo reticularis) caused by abnormalities in the tiny blood vessels of the skin (dermal capillaries). However, these conditions are also common in the general population. Depending on the genetic cause of familial TAAD in particular families, they may have an increased risk of developing blockages in smaller arteries, which can lead to heart attack and stroke. [from GHR] more

7.

Congenital aneurysm of ascending aorta

Aneurysms and dissections of the aorta usually result from degenerative changes in the aortic wall. Thoracic aortic aneurysms and dissections are primarily associated with a characteristic histologic appearance known as 'medial necrosis' or 'Erdheim cystic medial necrosis' in which there is degeneration and fragmentation of elastic fibers, loss of smooth muscle cells, and an accumulation of basophilic ground substance. In contrast, degeneration leading to abdominal aortic aneurysm (100070) is usually caused by a combination of factors including age, atherosclerosis, hypertension, and infectious, inflammatory, or autoimmune processes. Medial necrosis and thoracic aortic aneurysm/dissection are known to occur in certain connective tissue diseases such as Marfan syndrome (154700), and vascular (type IV) Ehlers-Danlos syndrome (130050). More commonly, however, medial necrosis occurs in the absence of a clearly identifiable syndrome. Genetic Heterogeneity of Thoracic Aortic Aneurysm Loci for isolated thoracic aortic aneurysm have been identified on chromosomes 11q (AAT1) and 5q (AAT2; 607087). Mutation in the MYH11 gene (160745) on chromosome 16p causes AAT4 (132900). Mutation in the ACTA2 gene (102620) on chromosome 10q causes AAT6 (611788). Mutation in the MYLK gene (600922) on chromosome 3q21 causes AAT7 (613780). Mutation in the PRKG1 gene (176894) on chromosome 10q11 causes AAT8 (615436). Mutation in the MFAP5 gene (601103) on chromosome 12p13 causes AAT9 (616166). Mutation in the LOX gene (153455) on chromosome 5q23 causes AAT10 (617168). Mutation in the FOXE3 gene (601094) on chromosome 1p33 causes susceptibility to AAT11 (617349). Thoracic aortic aneurysm with dissection (e.g., AAT3 and AAT5) can occur as a manifestation of the Loeys-Dietz syndrome (see LDS2, 610168 and LDS1, 609192, caused by mutation in the TGFBR2 (190182) and TGFBR1 (190181) genes, respectively). Reviews Pyeritz (2014) reviewed heritable thoracic aortic disorders with particular attention to causative genes, including components of the extracellular matrix, vascular smooth muscle cytoskeleton, and TGF-beta and other signaling pathways. [from OMIM]

8.

Scoliosis, isolated, susceptibility to, 1

Idiopathic scoliosis is a structurally fixed lateral curvature of the spine with a rotatory component. There is at least a 10 degree curvature as demonstrated by upright spine roentgenograms by the Cobb method (Weinstein, 1994). Scoliosis may occur secondary to other hereditary disorders including Marfan syndrome (154700), dysautonomia (223900), neurofibromatosis (see 162200), Friedreich ataxia (see 229300), and muscular dystrophies. Genetic Heterogeneity of Susceptibility to Isolated Scoliosis Loci for isolated scoliosis have been mapped to chromosome 19 (IS1), chromosome 17 (IS2; 607354), chromosome 8 (IS3; 608765), chromosome 9q31-q34 (IS4; 612238), and chromosome 17q25-qter (IS5; 612239). [from OMIM]

9.

Marfan lipodystrophy syndrome

Marfan lipodystrophy syndrome is characterized by congenital lipodystrophy, premature birth with an accelerated linear growth disproportionate to weight gain, and progeroid appearance with distinct facial features, including proptosis, downslanting palpebral fissures, and retrognathia. Other characteristic features include arachnodactyly, digital hyperextensibility, myopia, dural ectasia, and normal psychomotor development (Takenouchi et al., 2013). Takenouchi et al. (2013) noted phenotypic overlap with Marfan syndrome (154700) and Shprintzen-Goldberg craniosynostosis syndrome (182212). [from OMIM]

10.

Pneumothorax, primary spontaneous

Birt-Hogg-Dube syndrome (BHD; 135150), which is characterized by spontaneous pneumothorax as well as by fibrofolliculomas of the skin and increased risk of renal and colonic tumors, is caused by mutation in the FLCN gene. Gunji et al. (2007) suggested that isolated primary spontaneous pneumothorax associated with FLCN mutations may be part of the clinical spectrum of BHD, showing incomplete disease penetrance. Spontaneous pneumothorax is a complication of certain heritable disorders of connective tissue, particularly the Marfan syndrome (154700) and the Ehlers-Danlos syndrome (see, e.g., 130000). Pulmonary bullae can also occur with alpha-1-antitrypsin deficiency (613490). [from OMIM]

11.

Aortic aneurysm, familial thoracic 2

Familial thoracic aortic aneurysm and dissection (familial TAAD) involves problems with the aorta, which is the large blood vessel that distributes blood from the heart to the rest of the body. Familial TAAD affects the upper part of the aorta, near the heart. This part of the aorta is called the thoracic aorta because it is located in the chest (thorax). Other vessels that carry blood from the heart to the rest of the body (arteries) can also be affected.In familial TAAD, the aorta can become weakened and stretched (aortic dilatation), which can lead to a bulge in the blood vessel wall (an aneurysm). Aortic dilatation may also lead to a sudden tearing of the layers in the aorta wall (aortic dissection), allowing blood to flow abnormally between the layers. These aortic abnormalities are potentially life-threatening because they can decrease blood flow to other parts of the body such ... as the brain or other vital organs, or cause the aorta to break open (rupture).The occurrence and timing of these aortic abnormalities vary, even within the same affected family. They can begin in childhood or not occur until late in life. Aortic dilatation is generally the first feature of familial TAAD to develop, although in some affected individuals dissection occurs with little or no aortic dilatation.Aortic aneurysms usually have no symptoms. However, depending on the size, growth rate, and location of these abnormalities, they can cause pain in the jaw, neck, chest, or back; swelling in the arms, neck, or head; difficult or painful swallowing; hoarseness; shortness of breath; wheezing; a chronic cough; or coughing up blood. Aortic dissections usually cause severe, sudden chest or back pain, and may also result in unusually pale skin (pallor), a very faint pulse, numbness or tingling (paresthesias) in one or more limbs, or paralysis.Familial TAAD may not be associated with other signs and symptoms. However, some individuals in affected families show mild features of related conditions called Marfan syndrome or Loeys-Dietz syndrome. These features include tall stature, stretch marks on the skin, an unusually large range of joint movement (joint hypermobility), and either a sunken or protruding chest. Occasionally, people with familial TAAD develop aneurysms in the brain or in the section of the aorta located in the abdomen (abdominal aorta). Some people with familial TAAD have heart abnormalities that are present from birth (congenital). Affected individuals may also have a soft out-pouching in the lower abdomen (inguinal hernia), an abnormal curvature of the spine (scoliosis), or a purplish skin discoloration (livedo reticularis) caused by abnormalities in the tiny blood vessels of the skin (dermal capillaries). However, these conditions are also common in the general population. Depending on the genetic cause of familial TAAD in particular families, they may have an increased risk of developing blockages in smaller arteries, which can lead to heart attack and stroke. [from GHR] more

13.
14.

Microspherophakia

Microspherophakia (MSP) is a rare disease characterized by smaller and more spherical lenses than normal bilaterally, an increased anteroposterior thickness of the lens, and highly myopic eyes. Lens dislocation or subluxation may occur, leading to defective accommodation (summary by Ben Yahia et al., 2009). Microspherophakia may occur in association with ectopia lentis and glaucoma, Marfan syndrome (MFS; 154700), and Weill-Marchesani syndrome (WMS; 277600). [from OMIM]

15.

Megalocornea

Megalocornea is an inherited eye disorder in which the corneal diameter is bilaterally enlarged (greater than 13 mm) without an increase in intraocular pressure. It may also be referred to as 'anterior megalophthalmos,' since the entire anterior segment is larger than normal. Features of megalocornea in addition to a deep anterior chamber include astigmatic refractive errors, atrophy of the iris stroma, miosis secondary to decreased function of the dilator muscle, iridodonesis, and tremulousness, subluxation, or dislocation of the lens. Whereas most affected individuals exhibit normal ocular function, complications include cataract development and glaucoma following lenticular dislocation or subluxation. X-linked recessive inheritance is the most common pattern, accounting for the male preponderance of the disorder (summary by Skuta et al., 1983). Megalocornea sometimes occurs as part of the Marfan syndrome (154700). Genetic Heterogeneity of Megalocornea Autosomal recessive megalocornea has been reported (249300). [from OMIM]

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Marfan syndrome, incomplete

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