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There is no known specific treatment for this condition. Management is supportive.
A 1994 review of 150 cases reported in the literature found that 38% had died with a mean age of death of 2 years. 32% were still alive at the time of the report with a mean age of 4.65. No data were available for the remainder. The author described living with DDS as "walking a multidimensional tight rope".
Renal-hepatic-pancreatic dysplasia is an autosomal recessive congenital disorder characterized by pancreatic fibrosis, renal dysplasia and hepatic dysgenesis. It is usually fatal soon after birth.
An association with NPHP3 has been described.
It was characterized in 1959.
No specific treatment is available. Management is only supportive and preventive.
Those who are diagnosed with the disease often die within the first few months of life. Almost all children with the disease die by the age of three.
In the development of the human embryo, the metanephric kidneys fail to ascend and usually remain at the brim of the pelvis. This clinical scenario may present no signs or symptoms and the kidneys may function normally. It is associated at times with Mullerian dysgenesis.
There is currently no cure, but some symptoms may be treated such as neuroleptics for the psychiatric problems.
The prognosis is poor. Patients are usually wheelchair bound by their 20s and die by their 30s.
A pelvic kidney is a normal kidney located in the pelvis, instead of the abdomen. This occurs when a kidney does not ascend from its original location in the pelvis to its final location during fetal development. Typically, the kidney functions normally despite being in the wrong location. Often a person with a pelvic kidney will go through their whole life not even knowing they have this condition, unless it is discovered on newborn kidney ultrasound screening or if complications arise later in life for this or a completely different reason, and during investigations the condition is diagnosed. It is not a harmful condition generally, but can develop complications.
Aphalangy, hemivertebrae and urogenital-intestinal dysgenesis is an extremely rare syndrome, described only in three siblings. It associates hypoplasia or aplasia of phalanges of hands and feet, hemivertebrae and various urogenital and/or intestinal abnormalities. Intrafamilial variability is important as one sister had lethal abnormalities (Potter sequence and pulmonary hypoplasia), while her affected brother was in good health with normal psychomotor development at 6 months of age. Prognosis seems to depend mainly on the severity of visceral malformations. Etiology and inheritance remain unknown.
The cause of this condition is not known. A genetic basis is suspected. More than one case have been reported in three families.
Malouf syndrome (also known as "congestive cardiomyopathy-hypergonadotropic hypogonadism syndrome") is a congenital disorder that causes one or more of the following symptoms: mental retardation, ovarian dysgenesis, congestive cardiomyopathy, broad nasal base, blepharoptosis, and bone abnormalities, and occasionally marfanoid habitus (tall stature with long and thin limbs, little subcutaneous fat, arachnodactyly, joint hyperextension, narrow face, small chin, large testes, and hypotonia).
This disease is named after J. Malouf, who performed a case study on a family suffering from this disease in 1985.
"The phenotypic parameters that define a ciliopathy may be used to both recognize the cellular basis of a number of genetic disorders and to facilitate the diagnosis and treatment of some diseases of unknown" cause.
Cerebral dysgenesis–neuropathy–ichthyosis–keratoderma syndrome (also known as "CEDNIK syndrome") is a cutaneous condition caused by mutation in the SNAP29 gene.
The cause of DDS is most commonly (96% of patients) an abnormality in the WT1 gene (Wilms tumor suppressor gene). These abnormalities include changes in certain exons (9 and 8) and mutations in some alleles of the WT1 gene. Genetically, the syndrome is due to mutations in the Wilms tumor suppressor gene, WT1, which is on chromosome 11 (11p13). These mutations are usually found in exons 8 or 9, but at least one has been reported in exon 4.
Bamforth–Lazarus syndrome is a genetic condition that results in thyroid dysgenesis. It is due to recessive mutations in forkhead/winged-helix domain transcription factor ("FKLH15" or "TTF2").
It is associated with "FOXE1".
Although "non-motile" or primary cilia were first described in 1898, they were largely ignored by biologists. However, microscopists continued to document their presence in the cells of most vertebrate organisms. The primary cilium was long considered—with few exceptions—to be a largely useless evolutionary vestige, a vestigial organelle. Recent research has revealed that cilia are essential to many of the body's organs. These primary cilia play important roles in chemosensation, mechanosensation, and thermosensation. Cilia may thus be "viewed as sensory cellular antennae that coordinate a large number of cellular signaling pathways, sometimes coupling the signaling to ciliary motility or alternatively to cell division and differentiation."
Recent advances in mammalian genetic research have made possible the understanding of a molecular basis for a number of dysfunctional mechanisms in both motile and primary cilia structures of the cell. A number of critical developmental signaling pathways essential to cellular development have been discovered. These are principally but not exclusively found in the non-motile or primary cilia. A number of common observable characteristics of mammalian genetic disorders and diseases are caused by ciliary dysgenesis and dysfunction. Once identified, these characteristics thus describe a set of hallmarks of a ciliopathy.
Cilia have recently been implicated in a wide variety of human genetic diseases by "the discovery that numerous proteins involved in mammalian disease localize to the basal bodies and cilia." For example, in just a single area of human disease physiology, cystic renal disease, cilia-related genes and proteins have been identified to have causal effect in polycystic kidney disease, nephronophthisis, Senior-Loken syndrome type 5, orofaciodigital syndrome type 1 and Bardet-Biedl syndrome.
Walker–Warburg syndrome (WWS), also called Warburg syndrome, Chemke syndrome, HARD syndrome (Hydrocephalus, Agyria and Retinal Dysplasia), Pagon syndrome, cerebroocular dysgenesis (COD) or cerebroocular dysplasia-muscular dystrophy syndrome (COD-MD), is a rare form of autosomal recessive congenital muscular dystrophy. It is associated with brain (lissencephaly, hydrocephalus, cerebellar malformations) and eye abnormalities. This condition has a worldwide distribution. The overall incidence is unknown but a survey in North-eastern Italy has reported an incidence rate of 1.2 per 100,000 live births. It is the most severe form of congenital muscular dystrophy with most children dying before the age of three years.
The cause of this condition is not presently known. It appears to be inherited in an autosomal dominant fashion.
Treatment is symptomatic, and may include anti-seizure medication and special or supplemental education consisting of physical, occupational, and speech therapies.
An open-label Phase II clinical trial studying the use of red blood cells (erythrocytes) loaded with dexamethasone sodium phosphate found that this treatment improved symptoms and appeared to be well tolerated. This treatment uses a unique delivery system for medication by using the patient's own red blood cells as the delivery vehicle for the drug. Given the other immunologic deficits present in individuals with A-T, there remains a need to evaluate the therapeutic potential of steroids further, particularly with respect to the duration of any benefit and its long-term safety.
The effect of the disorder is female to male sex reversal. Patients also exhibit renal, adrenal, and lung dysgenesis. One indicator is low levels of unconjugated estriol in maternal serum, because this denotes adrenal hypoplasia.
The US, UK, Australia, Israel, The Netherlands, Germany, Poland, Norway and Japan have specialized clinics for patients with A-T. These clinics house multidisciplinary medical teams, including neurologists, immunologists, pulmonologists and therapists, capable of dealing with the many facets of this disease.
Acorea, microphthalmia and cataract syndrome is a rare genetically inherited condition.
Probably, the most well-known teratogenic drug is thalidomide. It was developed near the end of the 1950s by Chemie Grűnenthal as a sleep inducing aid and antiemetic. Because of its ability to prevent nausea it was prescribed for pregnant women in almost 50 countries worldwide between 1956–1962. Until William McBride published the study leading to its withdrawal from the market at 1961, about 8- 10 000 severely malformed children were born. The most typical disorder induced by thalidomide were reductional deformities of the long bones of the extremities. Phocomelia otherwise a rare deformity, which therefore helped to recognise the teratogenic effect of the new drug. Among other malformations caused by thalidomide were those of ears, eyes, brain, kidney, heart, digestive and respiratory tract. 40% of the prenatally affected children died soon after birth. As thalidomide is used today as a treatment for multiple myeloma and leprosy, several births of affected children were described in spite of the strictly required use of contraception among female patients treated by it.
Vitamin A, or retinol, is the sole vitamin which is embryotoxic even in a therapeutic dose, for example in multivitamins, because its metabolite, the retinoic acid, plays an important role as a signal molecule in the development of several tisues and organs. Its natural precursor, the β-carotene, is considered safe, whereas the consumption of animal liver can lead to malformation, as the liver stores lipophile vitamins, including retinol. Isotretinoin (13-cis-retinoic-acid; brand name Roaccutane), vitamine A analog, which is often used to treat severe acne, is such a strong teratogen that just a single dose taken by a pregnant woman (even transdermally) may result in serious birth defects. Because of this effect, most countries have systems in place to ensure that it is not given to pregnant women, and that the patient is aware of how important it is to prevent pregnancy during and at least one month after treatment. Medical guidelines also suggest that pregnant women should limit vitamin A intake to about 700 μg/day, as it has teratogenic potential when consumed in excess. Vitamine A and similar substances can induce spontaneous abortions, premature births, defects of eyes (microphthalmia), ears, thymus, face deformities, neurological (hydrocephalus, microcephalia) and cardiovascular defects, as well as mental retardation.
Tetracycline, an antibiotic, should never be prescribed to women in the reproductive age or children, because of its negative impact on bone mineralization and teeth mineralization. The "tetracycline teeth" have brown or grey colour as a result of a defective development of both the dentine and the enamel of teeth.
Several anticonvulsants are known to be highly teratogenic. Phenytoin, also known as diphenylhydantoin, along with carbamazepine is responsible for the fetal hydantoin syndrome, which may typically include broad nose base, cleft lip and/or palate, microcephalia, nails and fingers hypoplasia, intrauterine growth restriction and mental retardation. Trimethadione taken during pregnancy is responsible for the fetal trimethadione syndrome, characterized by craniofacial, cardiovascular, renal and spine malformations, along with a delay in mental and physical development. Valproate has anti-folate effects, leading to neural tube closure-related defects such as spina bifida. Lower IQ and autism have recently also been reported as a result of intrauterine valproate exposure.
Hormonal contraception is considered as harmless for the embryo. Peterka and Novotná do however state that syntethic progestines used to prevent miscarriage in the past frequently caused masculinization of the outer reproductive organs of female newborns due to their androgenic activity. Diethylstilbestrol is a synthetic estrogen used from the 1940s to 1971 when the prenatal exposition has been linked to the clear-cell adenocarcinoma of the vagina. Following studies showed elevated risks for other tumors and congenital malformations of the sex organs for both sexes.
All cytostatics are strong teratogens, abortion is usually recommended when pregnancy is found during or before chemotherapy. Aminopterin, a cytostatic drug with anti-folate effect, was used during the 1950s and 1960s to induce therapeutic abortions. In some cases the abortion didn´t happen, but the newborns suffered a fetal aminopterin syndrome consisting of growth retardation, craniosynostosis, hydrocephalus, facial dismorphities, mental retardation and/or leg defomities
There are currently no specific medical treatments for callosal disorders, but individuals with ACC and other callosal disorders may benefit from a range of developmental therapies, educational support, and services. It is important to consult with a variety of medical, health, educational, and social work professionals. Such professionals include neurologists, neuropsychologists, occupational therapists, physical therapists, speech and language pathologists, pediatricians, music therapists, geneticists, Social workers, special educators, early childhood intervention specialists, and caregivers for adults.