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Agenesis of the corpus callosum

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https://www.readbyqxmd.com/read/27909566/prenatal-diagnosis-of-a-terminal-chromosome-1-q42-q44-deletion-original-case-report-and-review-of-the-literature
#1
C Van Linthout, V Emonard, J S Gatot, X Capelle, F Kridelka, P Emonts, M C Segghaye
Terminal chromosome 1q deletion is rarely reported but causes typical malformations that have been well described in childhood. Clinical features include facial dysmorphy, growth and/or psychomotor retardation, brain agenesis or hypoplasia of the corpus callosum, epilepsy and occasional urogenital or cardiac malformations. The diagnosis of this condition is usually made at birth. The rare cases of antenatal diagnosis were based on microcephaly and growth retardation. In the present case, the foetus presented with an hypoplasia of the corpus callosum, a dysmorphic profile and a single umbilical artery...
June 27, 2016: Facts, Views & Vision in ObGyn
https://www.readbyqxmd.com/read/27857787/a-study-of-neurosonogram-abnormalities-clinical-correlation-with-neurosonogram-findings-and-immediate-outcome-of-high-risk-neonates-in-neonatal-intensive-care-unit
#2
Niranjan Nagaraj, Pramod Kumar Berwal, Anusha Srinivas, Ramnarayan Sehra, Sarika Swami, Prathyusha Jeevaji, Gotam Swami, Lokesh Choudary, Ayush Berwal
BACKGROUND: Neonatal sonography of the brain is now an essential part of newborn care, particularly in high risk and unstable premature infants. Cranial ultrasound is the most available and easily repeatable imaging technique for the neonatal brain showing brain development and the most frequently occurring forms of cerebral injury in the preterm and terms. This study aims to assess the importance of cranial ultrasound as an investigatory modality for high-risk neonates and to find out the morphology of various cerebral lesions and correlate clinically...
July 2016: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/27831545/neuroimaging-findings-in-mowat-wilson-syndrome-a-study-of-54-patients
#3
Livia Garavelli, Ivan Ivanovski, Stefano Giuseppe Caraffi, Daniela Santodirocco, Marzia Pollazzon, Duccio Maria Cordelli, Ebtesam Abdalla, Patrizia Accorsi, Margaret P Adam, Chiara Baldo, Allan Bayat, Elga Belligni, Federico Bonvicini, Jeroen Breckpot, Bert Callewaert, Guido Cocchi, Goran Cuturilo, Koenraad Devriendt, Mary Beth Dinulos, Olivera Djuric, Roberta Epifanio, Francesca Faravelli, Debora Formisano, Lucio Giordano, Marina Grasso, Sabine Grønborg, Alessandro Iodice, Lorenzo Iughetti, Didier Lacombe, Massimo Maggi, Baris Malbora, Isabella Mammi, Sebastien Moutton, Rikke Møller, Petra Muschke, Manuela Napoli, Chiara Pantaleoni, Rosario Pascarella, Alessandro Pellicciari, Maria Luisa Poch-Olive, Federico Raviglione, Francesca Rivieri, Carmela Russo, Salvatore Savasta, Gioacchino Scarano, Angelo Selicorni, Margherita Silengo, Giovanni Sorge, Luigi Tarani, Luis Gonzaga Tone, Annick Toutain, Aurelien Trimouille, Elvis Terci Valera, Samantha Schrier Vergano, Nicoletta Zanotta, Marcella Zollino, William B Dobyns, Alex R Paciorkowski
PURPOSE: Mowat-Wilson syndrome (MWS) is a genetic disease characterized by distinctive facial features, moderate to severe intellectual disability, and congenital malformations, including Hirschsprung disease, genital and eye anomalies, and congenital heart defects, caused by haploinsufficiency of the ZEB2 gene. To date, no characteristic pattern of brain dysmorphology in MWS has been defined. METHODS: Through brain magnetic resonance imaging (MRI) analysis, we delineated a neuroimaging phenotype in 54 MWS patients with a proven ZEB2 defect, compared it with the features identified in a thorough review of published cases, and evaluated genotype-phenotype correlations...
November 10, 2016: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/27794475/constitutional-560-49%C3%A2-kb-chromosome-2p24-3-duplication-including-the-mycn-gene-identified-by-snp-chromosome-microarray-analysis-in-a-child-with-multiple-congenital-anomalies-and-bilateral-wilms-tumor
#4
Mark A Micale, Bedford Embrey, Jacqueline K Macknis, Cheryl E Harper, David J Aughton
Fewer than 100 patients with partial chromosome 2p trisomy have been reported. Clinical features are variable and depend on the size of the duplicated segment, but generally include psychomotor delay, facial anomalies, congenital heart defect, and other abnormalities. We report a 560.49 kb duplication of chromosome 2p in a 13 month-old male with hydrocephaly, ventricular septal defect, partial agenesis of the corpus callosum, and bilateral Wilms tumor. After discovery of bilateral renal masses at four months of age, the child underwent neoadjuvant chemotherapy followed by right radical nephrectomy that revealed triphasic Wilms' tumor...
December 2016: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/27748028/a-chinese-patient-with-toriello-carey-syndrome-and-an-interstitial-deletion-of-3q
#5
Lulu Xie, Xianqiong Luo, Jie Yang, Junping Wang, Chuan Nie, Zhu Wang
Toriello-Carey syndrome (T-CS), which was first described by Toriello and Carey, is a rare multiple congenital anomaly syndrome characterized by agenesis of the corpus callosum, Pierre Robin sequence, unusual facial appearance, and other anomalies. Tracheal or laryngeal anomalies are reported as a common manifestation of T-CS. These anomalies can lead to respiratory distress and respiratory tract infection. The cause of T-CS is unknown, although there have been reports of patients with a clinical diagnosis of T-CS and a chromosome anomaly...
October 17, 2016: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/27732850/astroglial-mediated-remodeling-of-the-interhemispheric-midline-is-required-for-the-formation-of-the-corpus-callosum
#6
Ilan Gobius, Laura Morcom, Rodrigo Suárez, Jens Bunt, Polina Bukshpun, William Reardon, William B Dobyns, John L R Rubenstein, A James Barkovich, Elliott H Sherr, Linda J Richards
The corpus callosum is the major axon tract that connects and integrates neural activity between the two cerebral hemispheres. Although ∼1:4,000 children are born with developmental absence of the corpus callosum, the primary etiology of this condition remains unknown. Here, we demonstrate that midline crossing of callosal axons is dependent upon the prior remodeling and degradation of the intervening interhemispheric fissure. This remodeling event is initiated by astroglia on either side of the interhemispheric fissure, which intercalate with one another and degrade the intervening leptomeninges...
October 11, 2016: Cell Reports
https://www.readbyqxmd.com/read/27729957/fetal-central-nervous-system-anomalies-detected-by-magnetic-resonance-imaging-a-two-year-experience
#7
Sepideh Sefidbakht, Sakineh Dehghani, Maryam Safari, Homeira Vafaei, Maryam Kasraeian
BACKGROUND: Magnetic resonance imaging (MRI) is gradually becoming more common for thorough visualization of the fetus than ultrasound (US), especially for neurological anomalies, which are the most common indications for fetal MRI and are a matter of concern for both families and society. OBJECTIVES: We investigated fetal MRIs carried out in our center for frequency of central nervous system anomalies. This is the first such report in southern Iran. MATERIALS AND METHODS: One hundred and seven (107) pregnant women with suspicious fetal anomalies in prenatal ultrasound entered a cross-sectional retrospective study from 2011 to 2013...
August 2016: Iranian Journal of Pediatrics
https://www.readbyqxmd.com/read/27714487/neuroimaging-findings-of-zika-virus-infection-a-review-article
#8
REVIEW
Mohammad Zare Mehrjardi, Elham Keshavarz, Andrea Poretti, Adriano N Hazin
Zika virus (ZIKV) is an arbovirus from the Flaviviridae family. It is usually transmitted by mosquito bite. There have been no reports of severe symptoms caused by ZIKV infection up until the last few years. In October 2013 an outbreak was reported in French Polynesia with severe neurological complications in some affected cases. In November 2015, the Ministry of Health of Brazil attributed the increased number of neonatal microcephaly cases in northeastern Brazil to congenital ZIKV infection. The rapid spread of the virus convinced the World Health Organization to announce ZIKV infection as a "Public Health Emergency of International Concern" in February 2016...
December 2016: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/27683483/clinical-characterization-genetics-and-long-term-follow-up-of-a-large-cohort-of-patients-with-agenesis-of-the-corpus-callosum
#9
Romina Romaniello, Susan Marelli, Roberto Giorda, Maria F Bedeschi, Maria C Bonaglia, Filippo Arrigoni, Fabio Triulzi, Maria T Bassi, Renato Borgatti
To gain a better understanding of the clinical and genetic features associated with agenesis of corpus callosum, we enrolled and characterized 162 patients with complete or partial agenesis of corpus callosum. Clinical and genetic protocols allowed us to categorize patients as syndromic subjects, affected by complex extra-brain malformations, and nonsyndromic subjects without any additional anomalies. We observed slight differences in sex ratio (56% males) and agenesis type (52% complete). Syndromic agenesis of corpus callosum subjects were prevalent (69%)...
September 28, 2016: Journal of Child Neurology
https://www.readbyqxmd.com/read/27672547/coffin-siris-syndrome-with-caf%C3%A3-au-lait-spots-obesity-and-hyperinsulinism-caused-by-a-mutation-in-the-arid1b-gene
#10
Fatma Mujgan Sonmez, Eyyup Uctepe, Mehmet Gunduz, Zeliha Gormez, Seval Erpolat, Murat Oznur, Mahmut Samil Sagiroglu, Huseyin Demirci, Esra Gunduz
Coffin-Siris syndrome (CSS) (MIM 135900) is characterized by developmental delay, severe speech impairment, distinctive facial features, hypertrichosis, aplasia or hypoplasia of the distal phalanx or nail of the fifth digit and agenesis of the corpus callosum. Recently, it was shown that mutations in the ARID1B gene are the main cause of CSS, accounting for 76% of identified mutations. Here, we report a 15 year-old female patient who was admitted to our clinic with seizures, speech problems, dysmorphic features, bilaterally big, large thumb, café-au-lait (CAL) spots, obesity and hyperinsulinism...
August 2016: Intractable & Rare Diseases Research
https://www.readbyqxmd.com/read/27614007/training-of-the-impaired-forelimb-after-traumatic-brain-injury-enhances-hippocampal-neurogenesis-in-the-emx1-null-mice-lacking-a-corpus-callosum
#11
Melanie Neumann, Wei Liu, Chongran Sun, Shih Yen Yang, Linda J Noble-Haeusslein, Jialing Liu
Unilateral brain injury is known to disrupt the balance between the two cortices, as evidenced by an abnormally high interhemispheric inhibitory drive from motor cortex M1intact to M1lesioned transmitted transcallosally. Our previous work has shown that the deletion of homeobox gene Emx1 not only led to the agenesis of the corpus callosum (cc), but also to reduced hippocampal neurogenesis. The current study sought to determine whether lacking the cc affected the recovery of forelimb function and hippocampal plasticity following training of the affected limb in mice with unilateral traumatic brain injuries (TBI)...
September 7, 2016: Behavioural Brain Research
https://www.readbyqxmd.com/read/27598823/further-evidence-that-de-novo-missense-and-truncating-variants-in-zbtb18-cause-intellectual-disability-with-variable-features
#12
J S Cohen, S Srivastava, K D Farwell Hagman, D N Shinde, R Huether, D Darcy, R Wallerstein, G Houge, S Berland, K G Monaghan, A Poretti, A L Wilson, W K Chung, A Fatemi
Identification of rare genetic variants in patients with intellectual disability (ID) has been greatly accelerated by advances in next generation sequencing technologies. However, due to small numbers of patients, the complete phenotypic spectrum associated with pathogenic variants in single genes is still emerging. Among these genes is ZBTB18 (ZNF238), which is deleted in patients with 1q43q44 microdeletions who typically present with ID, microcephaly, corpus callosum (CC) abnormalities, and seizures. Here we provide additional evidence for haploinsufficiency or dysfunction of the ZBTB18 gene as the cause of ID in five unrelated patients with variable syndromic features who underwent whole exome sequencing revealing separate de novo pathogenic or likely pathogenic variants in ZBTB18 (two missense alterations and three truncating alterations)...
September 6, 2016: Clinical Genetics
https://www.readbyqxmd.com/read/27581855/outcomes-associated-with-isolated-agenesis-of-the-corpus-callosum-a-meta-analysis
#13
REVIEW
Francesco D'Antonio, Giorgio Pagani, Alessandra Familiari, Asma Khalil, Tally-Lerman Sagies, Gustavo Malinger, Zvi Leibovitz, Catherine Garel, Marie Laure Moutard, Gianluigi Pilu, Amar Bhide, Ganesh Acharya, Martina Leombroni, Lamberto Manzoli, Aris Papageorghiou, Federico Prefumo
CONTEXT: Antenatal counseling in cases of agenesis of the corpus callosum (ACC) is challenging. OBJECTIVES: To ascertain the outcome in fetuses with isolated complete ACC and partial ACC. DATA SOURCES: Medline, Embase, CINAHL, and Cochrane databases. STUDY SELECTION: Studies reporting a prenatal diagnosis of ACC. The outcomes observed were: chromosomal abnormalities at standard karyotype and chromosomal microarray (CMA) analysis, additional anomalies detected only at prenatal MRI and at postnatal imaging or clinical evaluation, concordance between prenatal and postnatal diagnosis and neurodevelopmental outcome...
September 2016: Pediatrics
https://www.readbyqxmd.com/read/27568057/kcc3-deficiency-induced-disruption-of-paranodal-loops-and-impairment-of-axonal-excitability-in-the-peripheral-nervous-system
#14
Yuan-Ting Sun, Shun-Fen Tzeng, Thy-Sheng Lin, Kuei-Sen Hsu, Eric Delpire, Meng-Ru Shen
The autosomal recessive Hereditary Motor and Sensory Neuropathy with Agenesis of the Corpus Callosum (HMSN/ACC) is associated with the dysfunction of the K(+)-Cl(-) cotransporter type 3 (KCC3), which is an electroneutral cotransporter. We previously found that the inhibition of KCC3 cotransporter activity reduces the propagation of action potentials in the peripheral nervous system (PNS). However, the pathogenesis by which KCC3 deficiency impairs peripheral nerve function remains to be examined. Thus, we conducted imaging and electrophysiological studies in the peripheral nerves of KCC3(-/-) mice at various ages...
October 29, 2016: Neuroscience
https://www.readbyqxmd.com/read/27549381/braddock-carey-syndrome-a-21q22-contiguous-gene-syndrome-encompassing-runx1
#15
Stephen R Braddock, Sarah T South, Joshua D Schiffman, Maria Longhurst, Leslie R Rowe, John C Carey
In 1994, Braddock and Carey first reported two unrelated girls with a new multiple malformation syndrome. The primary features included Pierre Robin sequence, persistent neonatal-onset thrombocytopenia, agenesis of the corpus callosum, a distinctive facies, enamel hypoplasia, and severe developmental delay. Since that time, there have been multiple other reported patients with a similar phenotype. In addition, several reports of thrombocytopenia and developmental delay have been documented in association with deletions in the Down syndrome critical region at 21q22...
October 2016: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/27549148/fetal-development-of-the-corpus-callosum-insights-from-a-3t-dti-and-tractography-study-in-a-patient-with-segmental-callosal-agenesis
#16
Elisa Scola, Ida Sirgiovanni, Sabrina Avignone, Claudia Maria Cinnante, Riccardo Biffi, Monica Fumagalli, Fabio Triulzi
Commissural embryology mechanisms are not yet completely understood. The study and comprehension of callosal dysgenesis can provide remarkable insights into embryonic or fetal commissural development. The diffusion tensor imaging (DTI) technique allows the in vivo analyses of the white-matter microstructure and is a valid tool to clarify the disturbances of brain connections in patients with dysgenesis of the corpus callosum (CC). The segmental callosal agenesis (SCAG) is a rare partial agenesis of the corpus callosum (ACC)...
October 2016: Neuroradiology Journal
https://www.readbyqxmd.com/read/27510950/update-on-the-toriello-carey-syndrome
#17
Helga V Toriello, Chelsey Colley, Michael Bamshad
Toriello and Carey described a provisionally-unique syndrome comprised of agenesis of the corpus callosum, Pierre Robin anomaly, and a characteristic facial phenotype. Because the condition affected siblings, this entity was postulated to be an autosomal recessive multiple anomaly syndrome. Several patients were subsequently reported, and over time, it became apparent that the Toriello-Carey syndrome was etiologically heterogeneous. Based on previous reports, it is estimated that at least 20% of patients with a clinical diagnosis of Toriello-Carey syndrome have a chromosomal anomaly as the basis of the phenotype...
October 2016: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/27486480/partial-monosomy14q-involving-foxg1-and-nova1-in-an-infant-with-microcephaly-seizures-and-severe-developmental-delay
#18
H Fryssira, E Tsoutsou, S Psoni, S Amenta, T Liehr, E Anastasakis, Ch Skentou, A Ntouflia, I Papoulidis, E Manolakos, N Chaliasos
BACKGROUND: FOXG1 gene mutations have been associated with the congenital variant of Rett syndrome (RTT) since the initial description of two patients in 2008. The on-going accumulation of clinical data suggests that the FOXG1-variant of RTT forms a distinguishable phenotype, consisting mainly of postnatal microcephaly, seizures, hypotonia, developmental delay and corpus callosum agenesis. CASE PRESENTATION: We report a 6-month-old female infant, born at 38 weeks of gestation after in vitro fertilization, who presented with feeding difficulties, irritability and developmental delay from the first months of life...
2016: Molecular Cytogenetics
https://www.readbyqxmd.com/read/27476972/msh2-deficiency-leads-to-dysmyelination-of-the-corpus-callosum-impaired-locomotion-and-altered-sensory-function-in-mice
#19
Barthelemy Diouf, Prakash Devaraju, Laura J Janke, Yiping Fan, Sharon Frase, Donnie Eddins, Jennifer L Peters, Jieun Kim, Deqing Pei, Cheng Cheng, Stanislav S Zakharenko, William E Evans
A feature in patients with constitutional DNA-mismatch repair deficiency is agenesis of the corpus callosum, the cause of which has not been established. Here we report a previously unrecognized consequence of deficiency in MSH2, a protein known primarily for its function in correcting nucleotide mismatches or insertions and deletions in duplex DNA caused by errors in DNA replication or recombination. We documented that Msh2 deficiency causes dysmyelination of the axonal projections in the corpus callosum. Evoked action potentials in the myelinated corpus callosum projections of Msh2-null mice were smaller than wild-type mice, whereas unmyelinated axons showed no difference...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27462254/a-case-of-a-newborn-with-agenesis-of-the-corpus-callosum-complicated-with-ocular-albinism
#20
Michiko Miki, Makiko Miyamoto, Tatsuma Mitsutsuji, Hiroko Watanabe, Kazuhiro Shimizu, Junko Matsuo, Masahiro Tonari, Teruyo Kida, Jun Sugasawa, Tsunehiko Ikeda
PURPOSE: To report a case of ocular albinism found in a newborn infant in whom agenesis of the corpus callosum (ACC) was indicated in utero. CASE REPORT: This study involved a female newborn who was delivered after a gestational period of 41 weeks. The patient was referred to the Obstetrics Department at Takatsuki Hospital, Takatsuki City, Japan, after the indication of ACC by magnetic resonance imaging (MRI) at a nearby clinic during the fetal period. At birth, the baby's weight was 2,590 g, and ACC and ventricular enlargement were found by cranial sonography and cranial MRI...
January 2016: Case Reports in Ophthalmology
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