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1.

Ehlers-Danlos syndrome

Ehlers-Danlos syndrome is a group of disorders that affect the connective tissues that support the skin, bones, blood vessels, and many other organs and tissues. Defects in connective tissues cause the signs and symptoms of Ehlers-Danlos syndrome, which vary from mildly loose joints to life-threatening complications.Previously, there were more than 10 recognized types of Ehlers-Danlos syndrome, differentiated by Roman numerals. In 1997, researchers proposed a simpler classification that reduced the number of major types to six and gave them descriptive names: the classical type (formerly types I and II), the hypermobility type (formerly type III), the vascular type (formerly type IV), the kyphoscoliosis type (formerly type VIA), the arthrochalasia type (formerly types VIIA and VIIB), and the dermatosparaxis type (formerly type VIIC). This six-type classification, known as the Villefranche nomenclature, is still commonly used. The types are distinguished by their signs and symptoms, their underlying genetic causes, and their patterns of inheritance. Since 1997, several additional forms of the condition have been described. These additional forms appear to be rare, affecting a small number of families, and most have not been well characterized.Although all types of Ehlers-Danlos syndrome affect the joints and skin, additional features vary by type. An unusually large range of joint movement (hypermobility) occurs with most forms of Ehlers-Danlos syndrome, particularly the hypermobility type. Infants with hypermobile joints often have weak muscle tone, which can delay the development of motor skills such as sitting, standing, and walking. The loose joints are unstable and prone to dislocation and chronic pain. Hypermobility and dislocations of both hips at birth are characteristic features in infants with the arthrochalasia type of Ehlers-Danlos syndrome.Many people with Ehlers-Danlos syndrome have soft, velvety skin that is highly stretchy (elastic) and fragile. Affected individuals tend to bruise easily, and some types of the condition also cause abnormal scarring. People with the classical form of Ehlers-Danlos syndrome experience wounds that split open with little bleeding and leave scars that widen over time to create characteristic "cigarette paper" scars. The dermatosparaxis type of the disorder is characterized by skin that sags and wrinkles. Extra (redundant) folds of skin may be present as affected children get older.Some forms of Ehlers-Danlos syndrome, notably the vascular type and to a lesser extent the kyphoscoliosis and classical types, can involve serious and potentially life-threatening complications due to unpredictable tearing (rupture) of blood vessels. This rupture can cause internal bleeding, stroke, and shock. The vascular type of Ehlers-Danlos syndrome is also associated with an increased risk of organ rupture, including tearing of the intestine and rupture of the uterus (womb) during pregnancy. People with the kyphoscoliosis form of Ehlers-Danlos syndrome experience severe, progressive curvature of the spine that can interfere with breathing. [from GTR]

MedGen UID:
41720
Concept ID:
C0013720
Disease or Syndrome
2.

Syndrome

A characteristic symptom complex. [from MeSH]

MedGen UID:
11688
Concept ID:
C0039082
Disease or Syndrome
3.

Diagnosis

The determination of the nature of a disease or condition, or the distinguishing of one disease or condition from another. Assessment may be made through physical examination, laboratory tests, or the likes. Computerized programs may be used to enhance the decision-making process. [from MeSH]

MedGen UID:
8354
Concept ID:
C0011900
Finding
4.

Fragility

MedGen UID:
549780
Concept ID:
C0302113
Cell or Molecular Dysfunction
5.

Borries syndrome

MedGen UID:
542920
Concept ID:
C0270677
Disease or Syndrome
6.

Life Threatening

A situation that imperils the existence of an entity. [from NCI]

MedGen UID:
415288
Concept ID:
C2826244
Finding
7.

Autosomal dominant inheritance

A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in heterozygotes. In the context of medical genetics, an autosomal dominant disorder is caused when a single copy of the mutant allele is present. Males and females are affected equally, and can both transmit the disorder with a risk of 50% for each child of inheriting the mutant allele. [from HPO]

MedGen UID:
141047
Concept ID:
C0443147
Genetic Function; Intellectual Product
8.

Severe

Having a high degree of severity. For quantitative traits, a deviation of between four and five standard deviations from the appropriate population mean. [from HPO]

MedGen UID:
104640
Concept ID:
C0205082
Qualitative Concept
9.

Connective tissue disorder

A heterogeneous group of disorders, some hereditary, others acquired, characterized by abnormal structure or function of one or more of the elements of connective tissue, i.e., collagen, elastin, or the mucopolysaccharides. [from MeSH]

MedGen UID:
1098
Concept ID:
C0009782
Disease or Syndrome
10.

Inborn genetic diseases

Diseases that are caused by genetic mutations present during embryo or fetal development, although they may be observed later in life. The mutations may be inherited from a parent's genome or they may be acquired in utero. [from MeSH]

MedGen UID:
181981
Concept ID:
C0950123
Disease or Syndrome
11.

Vascular hemostatic disease

Pathological processes involving the integrity of blood circulation. Hemostasis depends on the integrity of BLOOD VESSELS, blood fluidity, and BLOOD COAGULATION. Majority of the hemostatic disorders are caused by disruption of the normal interaction between the VASCULAR ENDOTHELIUM, the plasma proteins (including BLOOD COAGULATION FACTORS), and PLATELETS. [from MeSH]

MedGen UID:
154721
Concept ID:
C0600502
Disease or Syndrome
12.

Avitene

MedGen UID:
149149
Concept ID:
C0733516
Amino Acid, Peptide, or Protein; Biomedical or Dental Material; Pharmacologic Substance
13.

Skin and Connective Tissue Diseases

A collective term for diseases of the skin and its appendages and of connective tissue. [from MeSH]

MedGen UID:
59786
Concept ID:
C0175166
Disease or Syndrome
14.

Vascular disorder

A non-neoplastic or neoplastic disorder affecting the arteries, veins, or lymphatic vessels. Examples include vasculitis, thrombophlebitis, arteriosclerosis, lymphedema, hemangioma, and angiosarcoma. [from NCI]

MedGen UID:
22621
Concept ID:
C0042373
Disease or Syndrome
15.

Genodermatosis

Diseases of the skin with a genetic component, usually the result of various inborn errors of metabolism. [from MeSH]

MedGen UID:
20779
Concept ID:
C0037277
Disease or Syndrome
16.

dermopathy

An abnormality of the skin. [from HPO]

MedGen UID:
20777
Concept ID:
C0037274
Disease or Syndrome
17.

Congenital, Hereditary, and Neonatal Diseases and Abnormalities

Diseases existing at birth and often before birth, or that develop during the first month of life (INFANT, NEWBORN, DISEASES), regardless of causation. Of these diseases, those characterized by structural deformities are termed CONGENITAL ABNORMALITIES. [from MeSH]

MedGen UID:
14319
Concept ID:
C0027612
Congenital Abnormality; Disease or Syndrome
18.

Abnormality of the skin

A skin abnormality that is present at birth or detected in the neonatal period. [from NCI]

MedGen UID:
11449
Concept ID:
C0037268
Disease or Syndrome; Finding
19.

Heredity

The transmission of traits encoded in GENES from parent to offspring. [from MeSH]

MedGen UID:
6814
Concept ID:
C0019266
Molecular Function
20.

Haemorrhagic disorders

Spontaneous or near spontaneous bleeding caused by a defect in clotting mechanisms (BLOOD COAGULATION DISORDERS) or another abnormality causing a structural flaw in the blood vessels (HEMOSTATIC DISORDERS). [from MeSH]

MedGen UID:
6799
Concept ID:
C0019087
Disease or Syndrome
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