Journals American Journal of Medical Ge...

American Journal of Medical Genetics. Part A
Kaitlin Morrison, Hitoshi Koshiya, Robert Safier, Amanda Brown, Carol May, Jerry Vockley, Lina Ghaloul-Gonzalez
TANGO2 deficiency disorder (TDD) is a neurodegenerative disease characterized by a broad and variable spectrum of clinical manifestations, even among individuals sharing the same pathogenic variants. Here, we report a severely affected individual with TDD presenting with intractable paroxysmal sympathetic hyperactivity (PSH). While progressive brain atrophy has been observed in TDD, PSH has not been reported. Despite comprehensive workup for an acute trigger, no definite cause was identified, and pharmacological interventions were ineffective to treat PSH...
April 18, 2024: American Journal of Medical Genetics. Part A
Dilek Uludağ Alkaya, Hasan Emir Taner, Timur Yıldırım, Evren Akpınar, Beyhan Tüysüz
Mucopolysaccharidosis type 10 is caused by biallelic variants in ARSK, which encodes for a lysosomal sulfatase. To date, seven patients with a mild phenotype resembling spondyloepiphyseal dysplasia or multiple epiphyseal dysplasia have been described. In this report, we present two novel ARSK variants and report clinical and radiological findings of three patients. The patients' initial complaints were hip or knee pain and a waddling gait. All patients showed normal intelligence, normal hearing and eye examinations, and none had organomegaly...
April 18, 2024: American Journal of Medical Genetics. Part A
Jonathan M Artal, Lindsey Randall, Sabina Rubeck, Megan Allyse, Marsha Michie, Kirsten A Riggan, Stephanie Meredith, Brian G Skotko
A 2003 survey revealed the scope of mothers' dissatisfaction with their postnatal support following a diagnosis of Down syndrome (DS). Substantial proportions of mothers reported that providers conveyed diagnoses with pity, emphasized negative aspects of DS, and neglected to provide adequate materials explaining DS. This study follows up on the 2003 survey by assessing whether parents' experiences have improved. Four DS nonprofit organizations, which participated in the original study, distributed a mixed-methods survey to families who have had children with DS between 2003 and 2022...
April 15, 2024: American Journal of Medical Genetics. Part A
Takeshi Yagyu, Kazufumi Ida, Teruo Noguchi
No abstract text is available yet for this article.
April 15, 2024: American Journal of Medical Genetics. Part A
Minna L Rodrigo, Christine Heubi, Eric Chiou, Ann Scheimann
Feeding difficulties, aspiration, and failure to thrive in infancy are commonly seen in patients with Prader-Willi Syndrome (PWS) and attributed to hypotonia. Patients with PWS and laryngeal clefts were identified by review of medical records at three tertiary care children's hospitals between 2017 and 2022. We present three patients with PWS with feeding difficulties who were also found to have laryngeal clefts which likely contributed to their feeding difficulties. Additional factors such as airway anomalies should be considered in patients with PWS, especially when swallowing dysfunction, dysphagia, or abnormal swallow evaluations are present...
April 15, 2024: American Journal of Medical Genetics. Part A
Emilia Stellacci, Jennefer N Carter, Luca Pannone, David Stevenson, Dorsa Moslehi, Serenella Venanzi, Jonathan A Bernstein, Marco Tartaglia, Simone Martinelli
Casitas B-lineage lymphoma (CBL) encodes an adaptor protein with E3-ligase activity negatively controlling intracellular signaling downstream of receptor tyrosine kinases. Somatic CBL mutations play a driver role in a variety of cancers, particularly myeloid malignancies, whereas germline defects in the same gene underlie a RASopathy having clinical overlap with Noonan syndrome (NS) and predisposing to juvenile myelomonocytic leukemia and vasculitis. Other features of the disorder include cardiac defects, postnatal growth delay, cryptorchidism, facial dysmorphisms, and predisposition to develop autoimmune disorders...
April 12, 2024: American Journal of Medical Genetics. Part A
Jennifer Cassady Hayek, Miriam G Blitzer, Nathaniel H Robin
There is a shortage of clinical geneticists, even with concerted recruitment efforts. Previously, no data had been collected about why young career geneticists chose this specialty. To investigate this question, we carried out a survey of current and recent medical genetics and genomics residents. The goal of this survey was to understand their reasons for pursuing medical genetics and genomics as a specialty. Results demonstrate that, for most, interest in genetics begins in medical school and was largely influenced by mentorship...
April 11, 2024: American Journal of Medical Genetics. Part A
Maria Barington, Mads Bak, Kristín Rós Kjartansdóttir, Thomas van Overeem Hansen, Ulf Birkedal, Elsebet Østergaard, Hanne Buciek Hove
Alu elements are short, interspersed elements located throughout the genome, playing a role in human diversity, and occasionally causing genetic diseases. Here, we report a novel Alu insertion causing Mowat-Wilson syndrome, a rare neurodevelopmental disorder, in an 8-year-old boy displaying the typical clinical features for Mowat-Wilson syndrome. The variant was not initially detected in genome sequencing data, but through deep phenotyping, which pointed to only one plausible candidate gene, manual inspection of genome sequencing alignment data enabled us to identify a de novo heterozygous Alu insertion in exon 8 of the ZEB2 gene...
April 11, 2024: American Journal of Medical Genetics. Part A
Kunal Kanwar, Saffiya Bashey, Brenda L Bohnsack, Andy Drackley, Alexander Ing, Safa Rahmani, Hantamalala Ralay Ranaivo, Patrick McMullen, Andrew Skol, Kailee Yap, Valerie Allegretti, Jennifer L Rossen
CHARGE syndrome is a rare multi-system condition associated with CHD7 variants. However, ocular manifestations and particularly ophthalmic genotype-phenotype associations, are not well-studied. This study evaluated ocular manifestations and genotype-phenotype associations in pediatric patients with CHARGE syndrome. A retrospective chart review included pediatric patients under 20 years-old with clinical diagnosis of CHARGE syndrome and documented ophthalmic examination. Demographics, genetic testing, and ocular findings were collected...
April 10, 2024: American Journal of Medical Genetics. Part A
Ruohao Wu, Wenting Tang, Pinggan Li, Zhe Meng, Xiaojuan Li, Liyang Liang
De novo germline variants of the SRY-related HMG-box 11 gene (SOX11) have been reported to cause Coffin-Siris syndrome-9 (CSS-9), a rare congenital disorder associated with multiple organ malformations, including ear anomalies. Previous clinical and animal studies have found that intragenic pathogenic variant or haploinsufficiency in the SOX11 gene could cause inner ear malformation, but no studies to date have documented the external ear malformation caused by SOX11 deficiency. Here, we reported a Chinese male with unilateral microtia and bilateral sensorineural deafness who showed CSS-like manifestations, including dysmorphic facial features, impaired neurodevelopment, and fingers/toes malformations...
April 9, 2024: American Journal of Medical Genetics. Part A
Andy Drackley, Merlene Peter, Pamela Rathbun, Alexander Ing, Carlos E Prada, Kai Lee Yap
Nonketotic hyperglycinemia (NKH) is a relatively well-characterized inborn error of metabolism that results in a combination of lethargy, hypotonia, seizures, developmental arrest, and, in severe cases, death early in life. Three genes encoding components of the glycine cleavage enzyme system-GLDC, AMT, and GCSH-are independently associated with NKH. We report on a patient with severe NKH in whom the homozygous pathogenic variant in AMT (NM_000481.3):c.602_603del (p.Lys201Thrfs*75) and the homozygous likely pathogenic variant in GLDC(NM_000170...
April 4, 2024: American Journal of Medical Genetics. Part A
Kłaniewska M, Rydzanicz M, Bladowska J, Borys-Iwanicka A, Iwanicka-Pronicka K, Wasilewski R, Odnoczko E, Zubkiewicz-Kucharska A, Smigiel R, Ploski R
Monoallelic pathogenic HMBS variants are a well-established cause of acute intermittent porphyria (AIP), whereas biallelic pathogenic variants may cause HMBS-related leukoencephalopathy which remains a poorly characterized disorder. We describe an 8-year-old girl with hypotonia, hearing impairment, horizontal nystagmus, bilateral strabismus, impaired visual acuity, and optic nerve atrophy. She had no epilepsy but sleep electroencephalogram showed paroxysmal changes in the right hemisphere with secondary generalizations...
April 3, 2024: American Journal of Medical Genetics. Part A
Mounika Endrakanti, Jyoti Sharma, Abdul S Ethayathulla, Punit Kaur, Shah Alam Khan, Madhulika Kabra, Neerja Gupta
Distal arthrogryposis type 5D (DA5D) is clinically characterized by knee extension contractures, distal joint contractures, clubfoot, micrognathia, ptosis, and scoliosis. We report nine affected individuals from eight unrelated Indian families with DA5D. Although the overall musculoskeletal phenotype is not very distinct from other distal arthrogryposis, the presence of fixed knee extension contractures with or without scoliosis could be an important early pointer to DA5D. We also report a possible founder variant in ECEL1 along with four novel variants and further expand the genotypic spectrum of DA5D...
April 3, 2024: American Journal of Medical Genetics. Part A
Elizabeth Martin, Elizabeth A VanSickle, Linda Z Rossetti
GATA2 and ZNF148 have both been mapped to chromosome 3q. Pathogenic variants in GATA2 have been associated with immunodeficiency and high risk for myelodysplasia, acute myeloid leukemia, and chronic myelomonocytic leukemia. Gain-of-function variants in ZNF148 have previously been suggested as a mechanism for agenesis of the corpus callosum (ACC). Here, we report a novel 10.4 Mb interstitial deletion on 3q12.33q22.1 including GATA2 and ZNF148 in a child with developmental delay, agenesis of the corpus callosum, and vertebral segmentation defects...
April 3, 2024: American Journal of Medical Genetics. Part A
Samantha A Brugmann, David E Clouthier, Katherine A Fantauzzo, Matthew P Harris, Juhee Jeong, Jean-Pierre Saint-Jeannet, Rolf W Stottmann, Amy E Merrill
The Society for Craniofacial Genetics and Developmental Biology (SCGDB) held its 46th Annual Meeting at Cincinnati Children's Hospital Medical Center in Cincinnati, Ohio on October 10th-12th, 2023. On the first day of the meeting, Drs. Sally Moody and Justin Cotney were each honored with the SCGDB Distinguished Scientist Awards for their exceptional contributions to the field of craniofacial biology. The following two days of the meeting featured five sessions that highlighted new discoveries in signaling and genomic mechanisms regulating craniofacial development, human genetics, translational and regenerative approaches, and clinical management of craniofacial differences...
April 2, 2024: American Journal of Medical Genetics. Part A
Hye Jin Kim, Minhye Kim, Seoyun Jang, Jae So Cho, Soo Yeon Kim, Anna Cho, Hunmin Kim, Byung Chan Lim, Jong-Hee Chae, Jieun Choi, Ki Joong Kim, WooJoong Kim
The clinical and genetic characteristics of SYNGAP1 mutations in Korean pediatric patients are not well understood. We retrospectively analyzed 13 individuals with SYNGAP1 mutations from a longitudinal aspect. Clinical data, genetic profiles, and electroencephalography (EEG) patterns were examined. Genotypic analyses included gene panels and whole-exome sequencing. All patients exhibited global developmental delay from early infancy, with motor development eventually reaching independent ambulation by 3 years of age...
April 2, 2024: American Journal of Medical Genetics. Part A
Swati Singh, Hitesh Shah, Ashwin Dalal, Anju Shukla, Gandham SriLakshmi Bhavani, Katta M Girisha
Biallelic variants in RSPRY1 have been found to result in spondyloepimetaphyseal dysplasia. Two siblings presenting with short stature, facial dysmorphism, progressive vertebral defects, small epiphysis, cupping and fraying of metaphyses, brachydactyly, and short metatarsals harbored a homozygous missense variant c.1652G>A;p.(Cys551Tyr) in the RSPRY1 gene. The phenotype in our patients resembles spondyloepimetaphyseal dysplasia, Faden-Alkuraya type. Thus, our study provides further evidence to support the association of RSPRY1 variants with spondyloepimetaphyseal dysplasia...
April 2, 2024: American Journal of Medical Genetics. Part A
Mamiko Yamada, Seiji Mizuno, Mie Inaba, Tomoko Uehara, Hidehito Inagaki, Hisato Suzuki, Fuyuki Miya, Toshiki Takenouchi, Hiroki Kurahashi, Kenjiro Kosaki
Sonic hedgehog signaling molecule (SHH) is a key molecule in the cilia-mediated signaling pathway and a critical morphogen in embryogenesis. The association between loss-of-function variants of SHH and holoprosencephaly is well established. In mice experiments, reduced or increased signaling of SHH have been shown to be associated with narrowing or excessive expansion of the facial midline, respectively. Herein, we report two unrelated patients with de novo truncating variants of SHH presenting with hypertelorism rather than hypotelorism...
April 2, 2024: American Journal of Medical Genetics. Part A
Hiroyuki Saitou, Taichi Kitaoka, Takuo Kubota, Junko Kanno, Hiroshi Mochizuki, Toshimi Michigami, Kosei Hasegawa, Ikuma Fujiwara, Takashi Hamajima, Daisuke Harada, Yuko Seki, Keisuke Nagasaki, Sumito Dateki, Noriyuki Namba, Hirofumi Tokuoka, Jeanne M Pimenta, Shelda Cohen, Keiichi Ozono
Achondroplasia (ACH) is a rare, autosomal dominant skeletal dysplasia characterized by short stature, characteristic facial configuration, and trident hands. Before vosoritide approval in Japan, patients with ACH could start growth hormone (GH) treatment at age 3 years. However, ACH and its treatment in young Japanese children have not been studied. This retrospective, longitudinal, medical records-based cohort study (before vosoritide approval) summarized symptoms, complications, monitoring, surgery/interventions, and height with/without GH in Japanese patients with ACH <5 years...
March 30, 2024: American Journal of Medical Genetics. Part A
Mary Ann Thomas, Tanya Bedard, Susan Crawford, R Brian Lowry
Craniofacial microsomia (CFM) primarily includes specific head and neck anomalies that co-occur more frequently than expected. The anomalies are usually asymmetric and affect craniofacial features; however, there are frequently additional anomalies of variable severity. Published prenatal findings for CFM are limited. This study contributes 11 cases with CFM and their anomalies identified prenatally. Cases born between January 1, 1997 and December 31, 2019 with CFM were abstracted from the Alberta Congenital Anomalies Surveillance System, which is a population-based program ascertaining congenital anomalies for livebirths, stillbirths, and termination of pregnancies for fetal anomalies...
March 30, 2024: American Journal of Medical Genetics. Part A
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