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Amish Lethal Microcephaly

Microcephaly Amish Type


Presentation

  • Such testing may provide or suggest a diagnosis not previously considered (e.g., mutation of a different gene or genes that results in a similar clinical presentation). For an introduction to comprehensive genomic testing click here.[ncbi.nlm.nih.gov]
  • […] joint motion [ more ] 0001376 Percent of people who have these symptoms is not available through HPO Autosomal recessive inheritance 0000007 Cerebellar hypoplasia Small cerebellum Underdeveloped cerebellum [ more ] 0001321 Congenital onset Symptoms present[rarediseases.info.nih.gov]
  • We present a further male patient with MCPHA born to distantly consanguineous parents in Ontario, Canada with Amish ancestors. Microcephaly was evident at 21 weeks gestation on ultrasound.[ir.lib.uwo.ca]
  • Although present at birth, malformation/deformation/or chromosomal abnormality may not be identified until later in life.[medicbind.com]
  • The documents contained in this web site are presented for information purposes only. The material is in no way intended to replace professional medical care by a qualified specialist and should not be used as a basis for diagnosis or treatment.[orpha.net]
Asymptomatic
  • At conception, each sib of an affected individual has a 25% chance of being affected, a 50% chance of being an asymptomatic carrier, and a 25% chance of being unaffected and not a carrier.[ncbi.nlm.nih.gov]
  • Heterozygotes (carriers) are asymptomatic, have normal urinary excretion of 2-ketoglutarate, and are not at risk of developing the disorder.[ncbi.nlm.nih.gov]
Death in Infancy
  • Showing of 33 80%-99% of people have these symptoms Cerebellar vermis hypoplasia 0001320 Death in infancy Infantile death Lethal in infancy [ more ] 0001522 Feeding difficulties Feeding problems Poor feeding [ more ] 0011968 Irritability Irritable 0000737[rarediseases.info.nih.gov]
  • […] muscle weakness Thoracic kyphosis Facial diplegia Nemaline bodies Slender build Myokymia Distal lower limb muscle weakness Hypoplasia of the musculature Heterogeneous Pectus excavatum Rapidly progressive Intracranial hemorrhage Acrania Triangular face Death[mendelian.co]
Poor Feeding
  • Showing of 33 80%-99% of people have these symptoms Cerebellar vermis hypoplasia 0001320 Death in infancy Infantile death Lethal in infancy [ more ] 0001522 Feeding difficulties Feeding problems Poor feeding [ more ] 0011968 Irritability Irritable 0000737[rarediseases.info.nih.gov]
Hepatomegaly
  • They may also have an unusually small lower jaw and chin (micrognathia) and an enlarged liver (hepatomegaly). Affected infants may have seizures and difficulty maintaining their body temperature.[ghr.nlm.nih.gov]
  • […] have these symptoms Cleft soft palate 0000185 Decreased fetal movement Less than 10 fetal movements in 12 hours 0001558 Decreased skull ossification Decreased bone formation of skull 0004331 Generalized tonic-clonic seizures Grand mal seizures 0002069 Hepatomegaly[rarediseases.info.nih.gov]
  • Mild hepatomegaly has been observed in several affected individuals, usually during acute illnesses associated with metabolic acidosis. 2-ketoglutaric acidosis has been demonstrated in a number of Amish infants with this disorder (a variable finding).[ncbi.nlm.nih.gov]
  • Myopathic facies Generalized muscle weakness Muscular dystrophy Ventriculomegaly Strabismus Epileptic encephalopathy Progressive neurologic deterioration Hepatic failure Elevated hepatic transaminase Respiratory failure Hypoplasia of the corpus callosum Hepatomegaly[mendelian.co]
Flexion Contracture
  • 0001376 Percent of people who have these symptoms is not available through HPO Autosomal recessive inheritance 0000007 Cerebellar hypoplasia Small cerebellum Underdeveloped cerebellum [ more ] 0001321 Congenital onset Symptoms present at birth 0003577 Flexion[rarediseases.info.nih.gov]
Joint Limitation
  • Limited joint mobility Limited joint motion [ more ] 0001376 Percent of people who have these symptoms is not available through HPO Autosomal recessive inheritance 0000007 Cerebellar hypoplasia Small cerebellum Underdeveloped cerebellum [ more ] 0001321[rarediseases.info.nih.gov]
Irritability
  • Showing of 33 80%-99% of people have these symptoms Cerebellar vermis hypoplasia 0001320 Death in infancy Infantile death Lethal in infancy [ more ] 0001522 Feeding difficulties Feeding problems Poor feeding [ more ] 0011968 Irritability Irritable 0000737[rarediseases.info.nih.gov]
  • Often they become very irritable starting in the second or third month of life.[ghr.nlm.nih.gov]
  • The single affected individual described by Siu et al [2010] had irritability and profound developmental delay. The Amish patients were able to breast/bottle feed early on, but developed severe irritability and seizures.[ncbi.nlm.nih.gov]
  • Case studies report that the infant has seizures early on, is cold all the time, becomes irritable at ages 12 - 16 weeks, and dies before the age of one year.[owlcation.com]
Neurologic Manifestation
  • Physical therapy may alleviate contractures or other secondary neurologic manifestations. Infectious illnesses are managed to minimize acidosis. GENETIC COUNSELING: Amish lethal microcephaly is inherited in an autosomal recessive manner.[ncbi.nlm.nih.gov]
  • Physical therapy may be considered if the affected child develops contractures or other secondary neurologic manifestations. The patients respond to benzodiazepine anxiolytics.[ncbi.nlm.nih.gov]
Tonic-Clonic Seizure
  • 0005968 Ventriculomegaly 0002119 5%-29% of people have these symptoms Cleft soft palate 0000185 Decreased fetal movement Less than 10 fetal movements in 12 hours 0001558 Decreased skull ossification Decreased bone formation of skull 0004331 Generalized tonic-clonic[rarediseases.info.nih.gov]
  • […] fraction Persistent lactic acidosis Hand muscle weakness Delayed speech and language development Wide nasal bridge Axial muscle weakness Long philtrum Abnormality of the genital system Gowers sign Severe lactic acidosis Spastic diplegia Generalized tonic-clonic[mendelian.co]
Cognitive Developmental Delay
  • Troyer Syndrome - progressive spastic paraparesis (lower limb paralysis), dysarthria (leads to difficulty in speaking), and pseudobulbar palsy (inability to control facial movements); distal amyotrophy (muscle atrophy); motor and cognitive developmental[owlcation.com]

Workup

  • Any further studies and workup should be directed by the presence of signs or symptoms pointing to an underlying diagnosis and are usually used as confirmatory testing for certain conditions.[mdpi.com]

Treatment

  • CLOSE Medical Disclaimer The medical information on this site is provided as an information resource only, and is not to be used or relied on for any diagnostic or treatment purposes.[diseaseinfosearch.org]
  • MANAGEMENT: Treatment of manifestations: Treatment is supportive only. Phenobarbital has been used to treat a few children with seizures. Physical therapy may alleviate contractures or other secondary neurologic manifestations.[ncbi.nlm.nih.gov]
  • Treatment - Amish lethal microcephaly Not supplied. Resources - Amish lethal microcephaly[checkorphan.org]
  • The text concludes by examining the important clinical implications of the recent advances in the field, from recognition of the genetic causes in individual patients to development of new treatments and interventions.[books.google.com]
  • You may also want to contact a university or tertiary medical center in your area, because these centers tend to see more complex cases and have the latest technology and treatments.[rarediseases.info.nih.gov]

Prognosis

  • Prognosis - Amish lethal microcephaly Not supplied. Treatment - Amish lethal microcephaly Not supplied. Resources - Amish lethal microcephaly[checkorphan.org]
  • Prognosis Prognosis is very poor: the average life span of affected infants is between five and six months. Last updated: 12/31/2010 This table lists symptoms that people with this disease may have.[rarediseases.info.nih.gov]
  • Prognosis Prognosis is very poor: the average life span of affected infants is between five and six months. The documents contained in this web site are presented for information purposes only.[orpha.net]
  • Prognosis Microcephaly is a lifelong condition with no known cure. The prognosis is usually worse for children who experienced an intrauterine infection or have a chromosomal or metabolic abnormality.[mdpi.com]
  • Prognosis. After the first two or three months of life, increasing irritability of unknown causes commonly develops [ Kelley et al 2002 ].[ncbi.nlm.nih.gov]

Etiology

  • General pathology Genetic and developmental anomalies amish type microcephaly MIM.607196 17q25.3 Wednesday 11 May 2005 Synopsis severe congenital microcephaly 2-ketoglutaric aciduria Etiology mutations in the SLC25A19 gene (MIM.606521), which encodes[humpath.com]
  • The book begins by examining the genetic architecture and etiology of neurodevelopmental disorders.[books.google.com]
  • Etiology All affected infants are homozygous for the same mutation of the SLC25A19 gene on chromosome 17 (17q25.3). Genetic counseling The condition follows an autosomal recessive pattern of inheritance.[rarediseases.info.nih.gov]
  • Etiology Microcephaly has been stratified and studied differently based on the etiology and the timing of onset.[mdpi.com]

Epidemiology

  • Epidemiology It has been described only in the Old Order Amish of Lancaster County Pennsylvania. In this population, birth prevalence is about 1/500.[rarediseases.info.nih.gov]
  • Summary Epidemiology It has been described only in the Old Order Amish of Lancaster County Pennsylvania. In this population, birth prevalence is about 1/500.[orpha.net]
  • "Methodologic issues in epidemiologic studies of congenital microcephaly". Early Hum Dev . 69 (1): 91–105. doi : 10.1016/S0378-3782(02)00065-8 . Opitz, J. M.; Holt, M. C. (1990). "Microcephaly: general considerations and aids to nosology".[en.wikipedia.org]
Sex distribution
Age distribution

Pathophysiology

  • J Clin Endocrinol Metab 93:2084–2088 CrossRef PubMed Google Scholar Werner ER, Blau N, Thöny B (2011) Tetrahydrobiopterin: biochemistry and pathophysiology (review).[link.springer.com]
  • Microcephaly is the only proven malformation, or congenital abnormality, found in the children of Hiroshima and Nagasaki. [26] Other relations [ edit ] Intracranial volume also affects this pathology, as it is related with the size of the brain. [27] Pathophysiology[en.wikipedia.org]

Prevention

  • Microcephaly, Amish type, MCPHA Symptoms - Amish lethal microcephaly Causes - Amish lethal microcephaly Prevention - Amish lethal microcephaly Not supplied.[checkorphan.org]
  • - 0% Emergent - ED Care Needed - Preventable/Avoidable - 0% Emergent - ED Care Needed - Not Preventable/Avoidable - 0% Primary diagnosis of injury 0% Primary diagnosis of mental health problems 0% Primary diagnosis of substance abuse 0% Primary diagnosis[codelay.com]
  • Additionally, increasing resources are being made available for the prevention and research of Zika virus including mosquito prevention and identification, and limiting travel to highly endemic areas.[mdpi.com]
  • Certain physicians have taken up practice in Amish communities in order to study the birth defects prevalent in them and to offer hope of treatment and prevention.[owlcation.com]

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