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The syndrome is a rare clinical disorder.
- Physical
- Overgrowth
- Accelerated skeletal maturation
- Dysmorphic facial features
- Prominent eyes
- Bluish sclerae
- Coarse eyebrows
- Upturned nose
- Radiologic examination
- Accelerated osseous maturation
- Phalangeal abnormalities
- Tubular thinning of the long bones
- Skull abnormalities
- Mental
- Often associated with intellectual disability (of variable degree)
WHIM Syndrome (or Warts, Hypogammaglobulinemia, Immunodeficiency, and Myelokathexis syndrome) is a rare congenital immunodeficiency disorder characterized by chronic noncyclic neutropenia.
Type 1 usually begins somewhere in the first three to 18 months of age and in considered the most severe of the three types. Symptoms include:
- Coarse facial features
- Enlarged liver, spleen, and/or heart
- Intellectual disability
- Seizures
- Abnormal bone formation of many bones
- Progressive deterioration of brain and spinal cord
- Increased or decreased perspiration
Patients have no vascular lesions, but have rapid psychomotor regression, severe and rapidly progressing neurologic signs, elevated sodium and chloride excretion in the sweat, and fatal outcome before the sixth year.
Hypergammaglobulinemia is a medical condition with elevated levels of gamma globulin.
It is a type of immunoproliferative disorder.
Type 2 appears when a child is around 18 months of age and in considered milder than Type 1 but still severe. Symptoms include:
- Symptoms similar to Type 1 but milder and progress more slowly.
Hypergammaglobulinemia is a condition that is characterized by the increased levels of a certain immunoglobulin in the blood serum. The name of the disorder refers to an excess of proteins after serum protein electrophoresis (found in the gammaglobulin region).
Most hypergammaglobulinemias are caused by an excess of immunoglobulin M (IgM), because this is the default immunoglobulin type prior to class switching. Some types of hypergammaglobulinemia are actually caused by a deficiency in the other major types of immunoglobulins, which are IgA, IgE and IgG.
There are 5 types of hypergammaglobulinemias associated with hyper IgM.
MeSH considers hyper IgM syndrome to be a form of dysgammaglobulinemia, not a form of hypergammaglobulinemia .
RAPADILINO syndrome is an autosomal recessive disorder characterized by:
- RA: radial ray defect
- PA: patellar aplasia, arched or cleft palate
- DI: diarrhea, dislocated joints
- LI: little size (short stature), limb malformation
- NO: nose slender and normal intelligence.
It is more prevalent in Finland than elsewhere in the world.
It has been associated with the gene RECQL4. This is also associated with Rothmund-Thomson syndrome and Baller-Gerold syndrome.
The common MTHFR deficiencies are usually asymptomatic, although the 677T variant can cause a mildly increased risk of some diseases.
For individuals homozygous in the 677T variant, there is a mildly elevated risk of thromboembolism (odds ratio 1.2), and stroke (odds ratio 1.26). There is also an elevated risk of neural tube defects among children of individuals with the C677T polymorphism (odds ratio 1.38).
For cardiovascular risk, common MTHFR deficiencies were once thought to be associated but meta-analyses indicate that correlation this was an artifact of publication bias.
Respiratory complications are often cause of death in early infancy.
Methylenetetrahydrofolate reductase (MTHFR) deficiency is the most common genetic cause of elevated serum levels of homocysteine (hyperhomocysteinemia). It is caused by genetic defects in MTHFR, which is an important enzyme in the methyl cycle.
Common variants of MTHFR deficiency are asymptomatic and have only minor effects on disease risk. Severe variants (from nonsense mutations) are vanishingly rare.
Patients exhibit increased susceptibility to bacterial and viral infections, especially from common serotype human papilloma virus, resulting in warts on the hands and feet starting in childhood. Myelokathexis refers to retention (kathexis) of neutrophils in the bone marrow (myelo). In addition, lymphocytes and IgG antibody levels (gammaglobulins) are often deficient.
Branchio-oculo-facial syndrome (BOFS) is a disease that arises from a mutation in the TFAP2A gene. It is a rare autosomal dominant disorder that starts to affect a child's development before birth. Symptoms of this condition include skin abnormalities on the neck, deformities of the ears and eyes, and other distinctive facial features such a cleft lip along with slow growth, mental retardation and premature graying of hair.
Hypogammaglobulinemia is a type of primary immunodeficiency disease in which not enough gamma globulins exist in the blood (thus "" + "gamma" + "globulin" + ""). This entails that not enough antibodies exist, which impairs the immune system. Hypogammaglobulinemia is a characteristic of common variable immunodeficiency.
causes:
nephrotic syndrome
“Branchio” refers to the branchial arches, also known as the pharyngeal arches, of the affected individual. The branchial arches are structures in the developing embryo that give rise to certain tissues in the neck and facial area. In individuals affected by this condition, the branchial arches fail to develop properly. This leads to some of the physical conditions of this syndrome, which include abnormal patches of skin on the neck and face region and can be abnormally hairy, thin or red and with a high number of blood vessels. “Oculo” refers to the eyes. Individuals have vision impairment due to several malformations in the eyes such as small eyeballs, blockage in the tear ducts or lacking eyes completely. “Facial” refers to the face; those affected can have several abnormalities in that region. These abnormalities include a cleft lip, a cleft palate which is an opening in the roof of the mouth, widely spaced eyes (hypertelorism), sharp corners of the mouth that point upward, a broad nose that can include a flattened tip, along with several deformations of both the external and middle ear structures. This syndrome is restricted to the face, but it can also cause underdeveloped or malformed kidneys.
OA1 is recognized by many different symptoms. Reduced visual acuity is accompanied by involuntary movements of the eye termed as nystagmus. Astigmatism is a condition wherein there occurs significant refractive error. Moreover, ocular albino eyes become crossed, a condition called as ‘lazy eyes’ or strabismus. Since very little pigment is present the iris becomes translucent and reflects light back. It appears green to blueish red. However, the most important part of the eye, the fovea which is responsible for acute vision, does not develop properly, probably indicating the role of melanin in the development stages of the eye. Some affected individuals may also develop photophobia/photodysphoria. All these symptoms are due to lack of pigmentation of the retina. Moreover, in an ocular albino eye, nerves from back of the eye to the brain may not follow the usual pattern of routing. In an ocular albino eye, more nerves cross from back of the eye to the opposite side of the brain instead of going to the both sides of the brain as in a normal eye. An ocular albino eye appears blueish pink in color with no pigmentation at all unlike a normal eye. Carrier women have regions of hypo- and hyper-pigmentation due to X-inactivation and partial iris transillumination and do not show any other symptoms exhibited by those affected by OA1.
Ocular albinism type 1 (OA1), also called Nettleship–Falls syndrome, is the most common type of ocular albinism, with a prevalence rate of 1:50,000. It is an inheritable classical Mendelian type X-linked recessive disorder wherein the retinal pigment epithelium lacks pigment while hair and skin appear normal. Since it is usually an X-linked disorder, it occurs mostly in males, while females are carriers unless they are homozygous. About 60 missense and nonsense mutations, insertions, and deletions have been identified in "Oa1". Mutations in OA1 have been linked to defective glycosylation and thus improper intracellular transportation.
The eponyms of the name "Nettleship–Falls syndrome" are the ophthalmologists Edward Nettleship and Harold Francis Falls.
CD25 deficiency or interleukin 2 receptor alpha deficiency is an immunodeficiency disorder associated with mutations in the interleukin 2 receptor alpha (CD25) (IL2RA) gene. The mutations cause expression of a defective α chain or complete absence thereof, an essential part of high-affinity interleukin-2 (IL-2) receptors. The result is a syndrome described as IPEX-like or a SCID.
In one patient, deficiency of CD25 on CD4+ lymphocytes caused significantly impaired sensitivity to IL-2. This was demonstrated by a lack of measurable response in anti-inflammatory interleukin-10 (IL-10) secretion to low-dose IL-2 incubation. Greatly reduced IL-10 secretion compared to healthy humans results in a syndrome comparable to IPEX syndrome, a type of autoimmunity which is caused by FoxP3 transcription factor dysfunction. In addition to IPEX-like symptoms, CD25 deficiency increases susceptibility to viral infections and possibly fungal and bacterial infections.
As IL-2 is an important inducer of lymphocyte proliferation, the absence of highly sensitive IL-2 receptors may also significantly hinder activation and clonal expansion of CD8+ and CD4+ lymphocytes and NK cells. One case also reported the absence of CD1, a MHC-like glycoprotein involved in the presentation of lipid antigens to T cells, in a CD25 deficient patient. Furthermore, chronic upregulation of anti-apoptotic Bcl-2 in thymocytes was also described possibly allowing autoreactive T cells to escape deletion.
Ataxia-telangiectasia (AT or A-T), also referred to as ataxia-telangiectasia syndrome or Louis–Bar syndrome, is a rare, neurodegenerative, autosomal recessive disease causing severe disability. Ataxia refers to poor coordination and telangiectasia to small dilated blood vessels, both of which are hallmarks of the disease.
A-T affects many parts of the body:
- It impairs certain areas of the brain including the cerebellum, causing difficulty with movement and coordination.
- It weakens the immune system, causing a predisposition to infection.
- It prevents repair of broken DNA, increasing the risk of cancer.
Symptoms most often first appear in early childhood (the toddler stage) when children begin to walk. Though they usually start walking at a normal age, they wobble or sway when walking, standing still or sitting, and may appear almost as if they are drunk. In late pre-school and early school age, they develop difficulty moving their eyes in a natural manner from one place to the next (oculomotor apraxia). They develop slurred or distorted speech, and swallowing problems. Some have an increased number of respiratory tract infections (ear infections, sinusitis, bronchitis, and pneumonia). Because not all children develop in the same manner or at the same rate, it may be some years before A-T is properly diagnosed. Most children with A-T have stable neurologic symptoms for the first 4–5 years of life, but begin to show increasing problems in early school years.
A-T is caused by a defect in the ATM gene, which is responsible for managing the cell’s response to multiple forms of stress including double-strand breaks in DNA. In simple terms, the protein produced by the ATM gene recognizes that there is a break in DNA, recruits other proteins to fix the break, and stops the cell from making new DNA until the repair is complete.
There is substantial variability in the severity of features of A-T among affected individuals, and at different ages. The following symptoms or problems are either common or important features of A-T:
- Ataxia (difficulty with control of movement) that is apparent early but worsens in school to pre-teen years
- Oculomotor apraxia (difficulty with coordination of head and eye movement when shifting gaze from one place to the next)
- Involuntary movements
- Telangiectasia (dilated blood vessels) over the white (sclera) of the eyes, making them appear bloodshot. These are not apparent in infancy and may first appear at age 5–8 years. Telangiectasia may also appear on sun-exposed areas of skin.
- Problems with infections, especially of the ears, sinuses and lungs
- Increased incidence of cancer (primarily, but not exclusively, lymphomas and leukemias)
- Delayed onset or incomplete pubertal development, and very early menopause
- Slowed rate of growth (weight and/or height)
- Drooling particularly in young children when they are tired or concentrating on activities
- Dysarthria (slurred, slow, or distorted speech sounds)
- Diabetes in adolescence or later
- Premature changes in hair and skin
Many children are initially misdiagnosed as having ataxic cerebral palsy. The diagnosis of A-T may not be made until the preschool years when the neurologic symptoms of impaired gait, hand coordination, speech and eye movement appear or worsen, and the telangiectasia first appear. Because A-T is so rare, doctors may not be familiar with the symptoms, or methods of making a diagnosis. The late appearance of telangiectasia may be a barrier to the diagnosis. It may take some time before doctors consider A-T as a possibility because of the early stability of symptoms and signs.
Methylene tetrahydrofolate reductase (MTHFR) is the rate-limiting enzyme in the methyl cycle, and it is encoded by the "MTHFR" gene. Methylenetetrahydrofolate reductase catalyzes the conversion of 5,10-methylenetetrahydrofolate to 5-methyltetrahydrofolate, a cosubstrate for homocysteine remethylation to methionine. Natural variation in this gene is common in healthy people. Although some variants have been reported to influence susceptibility to occlusive vascular disease, neural tube defects, Alzheimer's disease and other forms of dementia, colon cancer, and acute leukemia, findings from small early studies have not been reproduced. Some mutations in this gene are associated with methylenetetrahydrofolate reductase deficiency.
ATR-16 syndrome affects the blood, development, and brain; symptoms vary based on the specific genes deleted on chromosome 16. Because it is so rare, it is difficult to determine the "core" symptoms of the disease. People with ATR-16 have alpha-thalassemia, a blood disorder where there is less normal hemoglobin in the blood than there should be, and the red blood cells are smaller than they should be (microcytic anemia). Affected children have various characteristic physical features, including clubfoot, "locked" little fingers, microcephaly (small head), hypertelorism (widely spaced eyes), broad, prominent nose bridge, downward-slanted palpebral fissures, small ears, retrognathia, and short neck. Children with ATR-16 syndrome also have mild to moderate intellectual disabilities, developmental delays/growth delays, and speech delays. Some children with ATR-16 have seizures, cryptorchidism (undescended testes), or hypospadias.
ATR-16 syndrome, also called Alpha-Thalassemia-Intellectual disability syndrome is a rare disease characterized by monosomy on part of chromosome 16.
Estrogen insensitivity syndrome (EIS), or estrogen resistance, is a form of congenital estrogen deficiency or hypoestrogenism which is caused by a defective estrogen receptor (ER) – specifically, the estrogen receptor alpha (ERα) – that results in an inability of estrogen to mediate its biological effects in the body. Congenital estrogen deficiency can alternatively be caused by a defect in aromatase, the enzyme responsible for the biosynthesis of estrogens, a condition which is referred to as aromatase deficiency and is similar in symptomatology to EIS.
EIS is an extremely rare occurrence. As of 2016, there have been three published reports of EIS, involving a total of five individuals. The reports include a male case published in 1994, a female case published in 2013, and a familial case involving two sisters and a brother which was published in 2016.
EIS is analogous to androgen insensitivity syndrome (AIS), a condition in which the androgen receptor (AR) is defective and insensitive to androgens, such as testosterone and dihydrotestosterone (DHT). The functional opposite of EIS is hyperestrogenism, for instance that seen in aromatase excess syndrome.
Treatment is by parenteral administration of gamma globulins, either monthly intravenously, or, more recently, by weekly self-administered hypodermoclysis. In either case, mild allergic reactions (generalized pruritus, urticaria) are common, and are usually manageable with oral diphenhydramine.
Lipomatosis is believed to be an autosomal dominant condition in which multiple lipomas are present on the body. Many discrete, encapsulated lipomas form on the trunk and extremities, with relatively few on the head and shoulders. In 1993, a genetic polymorphism within lipomas was localized to chromosome 12q15, where the HMGIC gene encodes the high-mobility-group protein isoform I-C. This is one of the most commonly found mutations in solitary lipomatous tumors but lipomas often have multiple mutations. Reciprocal translocations involving chromosomes 12q13 and 12q14 have also been observed within.
Although this condition is benign, it can sometimes be very painful depending on location of the lipomas. Some patients who are concerned with cosmetics seek removal of individual lipomas. Removal can include simple excision, endoscopic removal, or liposuction.
Other entities which are accompanied by multiple lipomas include Proteus syndrome, Cowden syndrome and related disorders due to PTEN gene mutations, benign symmetric lipomatosis (Madelung disease),Dercum's Disease, familial lipodystrophy, hibernomas, epidural steroid injections with epidural lipomatosis, and familial angiolipomatosis.