Contents 1 Signs and symptoms 2 Causes 2.1 Recurrence risk 3 Diagnosis 4 Treatment 5 Prognosis 6 History 7 References 8 External links

Signs and symptoms[edit] Adolescent female with full trisomy 13 and associated facial features. While most affected people die in infancy, some survive for months or years. Six fingers in a baby with Patau syndrome 37-week gestational age male with Patau syndrome demonstrating alobar holoprosencephaly with cyclopia. Facial features included sloping forehead with a nose superior to a single central palpebral fissure. Of those fetuses that do survive to gestation and subsequent birth, common abnormalities may include: Nervous system Intellectual disability and motor disorder Microcephaly Holoprosencephaly (failure of the forebrain to divide properly). Structural eye defects, including microphthalmia, Peters' anomaly, cataract, iris or fundus (coloboma), retinal dysplasia or retinal detachment, sensory nystagmus, cortical visual loss, and optic nerve hypoplasia Meningomyelocele (a spinal defect) Musculoskeletal and cutaneous Polydactyly (extra digits) Cyclopia Proboscis Congenital trigger digits Low-set ears[3] Prominent heel Deformed feet known as rocker-bottom feet Omphalocele (abdominal defect) Abnormal palm pattern Overlapping of fingers over thumb Cutis aplasia (missing portion of the skin/hair) Cleft palate Urogenital Abnormal genitalia Kidney defects Other Heart defects (ventricular septal defect) (Patent Ductus Arteriosus) Dextrocardia Single umbilical artery[4]

Causes[edit] Patau syndrome is the result of trisomy 13, meaning each cell in the body has three copies of chromosome 13 instead of the usual two. A small percentage of cases occur when only some of the body's cells have an extra copy; such cases are called mosaic Patau. Patau syndrome can also occur when part of chromosome 13 becomes attached to another chromosome (translocated) before or at conception in a Robertsonian translocation. Affected people have two copies of chromosome 13, plus extra material from chromosome 13 attached to another chromosome. With a translocation, the person has a partial trisomy for chromosome 13 and often the physical signs of the syndrome differ from the typical Patau syndrome. Most cases of Patau syndrome are not inherited, but occur as random events during the formation of reproductive cells (eggs and sperm). An error in cell division called non-disjunction can result in reproductive cells with an abnormal number of chromosomes. For example, an egg or sperm cell may gain an extra copy of the chromosome. If one of these atypical reproductive cells contributes to the genetic makeup of a child, the child will have an extra chromosome 13 in each of the body's cells. Mosaic Patau syndrome is also not inherited. It occurs as a random error during cell division early in fetal development. Patau syndrome due to a translocation can be inherited. An unaffected person can carry a rearrangement of genetic material between chromosome 13 and another chromosome. This rearrangement is called a balanced translocation because there is no extra material from chromosome 13. Although they do not have signs of Patau syndrome, people who carry this type of balanced translocation are at an increased risk of having children with the condition. Recurrence risk[edit] Unless one of the parents is a carrier of a translocation, the chances of a couple having another trisomy 13 affected child is less than 1% (less than that of Down syndrome). The most common characteristics of this syndrome are problems such as late development, mental disability, multiple malformations, cardiopathy, and kidney abnormalities. The most common physical signs for Patau Syndrome are the decreasing of muscle tone, small hands, small ears, small head and mouth, as well as wide and short hands with short fingers. Physical development for children affected by Patau Syndrome occurs more slowly than children without Patau syndrome. However, children affected by Patau Syndrome should still undergo regular physical activity, even though muscle development may occur more slowly.

Diagnosis[edit] Diagnosis is usually based on clinical findings, although fetal chromosome testing will show trisomy 13. While many of the physical findings are similar to Edwards syndrome there are a few unique traits, such as polydactyly. However, unlike Edwards syndrome and Down syndrome, the quad screen does not provide a reliable means of screening for this disorder. This is due to the variability of the results seen in fetuses with Patau.[5]

Treatment[edit] Medical management of children with Trisomy 13 is planned on a case-by-case basis and depends on the individual circumstances of the patient. Treatment of Patau syndrome focuses on the particular physical problems with which each child is born. Many infants have difficulty surviving the first few days or weeks due to severe neurological problems or complex heart defects. Surgery may be necessary to repair heart defects or cleft lip and cleft palate. Physical, occupational, and speech therapy will help individuals with Patau syndrome reach their full developmental potential. Surviving children are described as happy and parents report that they enrich their lives.[6] The cited study grouped Edwards syndrome, which is sometimes survivable beyond toddlerhood, along with Patau, hence the median age of 4 at the time of data collection.

Prognosis[edit] More than 80% of children with Patau syndrome die within the first year of life.[7] Children with the mosaic variation are usually affected to a lesser extent.[8] In a retrospective Canadian study of 174 children with trisomy 13, median survival time was 12.5 days. One and ten year survival was 19.8% and 12.9% respectively. [9]

History[edit] Trisomy 13 was first observed by Thomas Bartholin in 1657,[10] but the chromosomal nature of the disease was ascertained by Dr. Klaus Patau in 1960.[11] The disease is named in his honor. In England and Wales during 2008–09, there were 172 diagnoses of Patau syndrome (trisomy 13), with 91% of diagnoses made prenatally. There were 111 elective abortions, 14 stillbirth/miscarriage/fetal deaths, 30 outcomes unknown, and 17 live births. Approximately 4% of Patau syndrome with unknown outcomes are likely to result in a live birth, therefore the total number of live births is estimated to be 18.[12]

References[edit] ^ "Prevalence and Incidence of Patau syndrome". Diseases Center-Patau Syndrome. Adviware Pty Ltd. 2008-02-04. Retrieved 2008-02-17. mean maternal age for this abnormality is about 31 years  ^ > Patau Syndrome (Trisomy 13) From Krissi Danielsson. Updated June 10, 2009 ^ H. Bruce Ostler (2004). Diseases of the eye and skin: a color atlas. Lippincott Williams & Wilkins. p. 72. ISBN 978-0-7817-4999-2. Retrieved 13 April 2010.  ^ "Trisomy 13: MedlinePlus Medical Encyclopedia". Retrieved 2010-04-12.  ^ Callahan, Tamara L., and Aaron B. Caughey. Blueprints Obstetrics & Gynecology. Baltimore, MD: Lippincott Williams & Wilkins, 2013. ^ Janvier, Annie; Farlow, Wilfond (August 1, 2012). "The experience of families with children with trisomy 13 and 18 in social networks". Pediatrics. 130 (2): 293–298. doi:10.1542/peds.2012-0151. PMID 22826570.  ^ ^ "Patau's Syndrome (Trisomy 13)". Retrieved 3 July 2014.  ^ "urvival and Surgical Interventions for Children With Trisomy 13 and 18". Retrieved 3 December 2016.  ^ synd/1024 at Who Named It? ^ Patau K, Smith DW, Therman E, Inhorn SL, Wagner HP (1960). "Multiple congenital anomaly caused by an extra autosome". Lancet. 1 (7128): 790–3. doi:10.1016/S0140-6736(60)90676-0. PMID 14430807.  ^ "National Down Syndrome Cytogenetic Register Annual Reports 2008/09". 

External links[edit] Classification V · T · D ICD-10: Q91.4-Q91.7 ICD-9-CM: 758.1 DiseasesDB: 13373 External resources MedlinePlus: 001660 eMedicine: article/947706 Patient UK: Patau syndrome Orphanet: 3378 Wikimedia Commons has media related to Patau syndrome. Trisomy 13 at WebMD "Trisomy 13 (Patau Syndrome)" SickKids v t e Chromosome abnormalities (Q90–Q99, 758) Autosomal Trisomies Down syndrome 21 Edwards syndrome 18 Patau syndrome 13 Trisomy 9 Warkany syndrome 2 8 Cat eye syndrome/Trisomy 22 22 Trisomy 16 Monosomies/deletions 1q21.1 deletion syndrome/1q21.1 duplication syndrome/TAR syndrome 1 Wolf–Hirschhorn syndrome 4 Cri du chat/Chromosome 5q deletion syndrome 5 Williams syndrome 7 Jacobsen syndrome 11 Miller–Dieker syndrome/Smith–Magenis syndrome 17 DiGeorge syndrome 22 22q11.2 distal deletion syndrome 22 22q13 deletion syndrome 22 genomic imprinting Angelman syndrome/Prader–Willi syndrome (15) Distal 18q-/Proximal 18q- X/Y linked Monosomy Turner syndrome (45,X) Trisomy/tetrasomy, other karyotypes/mosaics Klinefelter syndrome (47,XXY) XXYY syndrome (48,XXYY) XXXY syndrome (48,XXXY) 49,XXXYY 49,XXXXY Triple X syndrome (47,XXX) Tetrasomy X (48,XXXX) 49,XXXXX Jacobs syndrome (47,XYY) 48,XYYY 49,XYYYY 45,X/46,XY Translocations Leukemia/lymphoma Lymphoid Burkitt's lymphoma t(8 MYC;14 IGH) Follicular lymphoma t(14 IGH;18 BCL2) Mantle cell lymphoma/Multiple myeloma t(11 CCND1:14 IGH) Anaplastic large-cell lymphoma t(2 ALK;5 NPM1) Acute lymphoblastic leukemia Myeloid Philadelphia chromosome t(9 ABL; 22 BCR) Acute myeloblastic leukemia with maturation t(8 RUNX1T1;21 RUNX1) Acute promyelocytic leukemia t(15 PML,17 RARA) Acute megakaryoblastic leukemia t(1 RBM15;22 MKL1) Other Ewing's sarcoma t(11 FLI1; 22 EWS) Synovial sarcoma t(x SYT;18 SSX) Dermatofibrosarcoma protuberans t(17 COL1A1;22 PDGFB) Myxoid liposarcoma t(12 DDIT3; 16 FUS) Desmoplastic small-round-cell tumor t(11 WT1; 22 EWS) Alveolar rhabdomyosarcoma t(2 PAX3; 13 FOXO1) t (1 PAX7; 13 FOXO1) Other Fragile X syndrome Uniparental disomy XX male syndrome/46,XX testicular disorders of sex development Marker chromosome Ring chromosome 6; 9; 14; 15; 18; 20; 21, 22 Retrieved from "" Categories: Autosomal trisomiesSyndromes with microcephalySyndromes with cleft lip and/or palateSyndromes affecting the nervous systemSyndromes with dysmeliaSyndromes affecting the heartHidden categories: Infobox medical condition (new)

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Patau_syndrome - Photos and All Basic Informations

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