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Case Reports in Genetics

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https://www.readbyqxmd.com/read/30155321/biallelic-mismatch-repair-deficiency-in-an-adolescent-female
#1
Amber Hildreth, Mark A Valasek, Irene Thung, Thomas Savides, Mamata Sivagnanam, Sonia Ramamoorthy, Sherry C Huang
Constitutional (Biallelic) Mismatch Repair Deficiency is a rare autosomal recessive disorder characterized by numerous cancers presenting as early as the first decade of life. Biallelic germline variants in one of four mismatch repair genes ( MLH1, MSH2, MSH6, or PMS2 ) cause this devastating disease. Given the rarity of the syndrome, often-asymptomatic tumors, and overlap with neurofibromatosis-1, diagnosis is frequently unrecognized or delayed. We present a unique case of a 14-year-old female with minimal gastrointestinal symptoms diagnosed with invasive adenocarcinoma secondary to biallelic PMS2 variants...
2018: Case Reports in Genetics
https://www.readbyqxmd.com/read/30155320/a-rare-case-of-severe-congenital-ryr1-associated-myopathy
#2
Nicola Laforgia, Manuela Capozza, Lucrezia De Cosmo, Antonio Di Mauro, Maria Elisabetta Baldassarre, Francesca Mercadante, Anna Laura Torella, Vincenzo Nigro, Nicoletta Resta
Congenital myopathies are a group of rare inherited diseases, defined by hypotonia and muscle weakness. We report clinical and genetic characteristics of a male preterm newborn, whose phenotype was characterized by severe hypotonia and hyporeactivity, serious respiratory distress syndrome that required mechanical ventilation, clubfoot, and other dysmorphic features. The diagnostic procedure was completed with the complete exome sequencing of the proband and of his parents and his sister, which showed new mutations in the ryanodine receptor gene (RYR1), which maps to chromosome 19q13...
2018: Case Reports in Genetics
https://www.readbyqxmd.com/read/30147969/lama2-congenital-muscle-dystrophy-a-novel-pathogenic-mutation-in-bulgarian-patient
#3
Ivanka Dimova, Ivo Kremensky
Congenital muscle dystrophies (CMD) are genetically and clinically heterogeneous hereditary myopathies mainly with autosomal recessive type of inheritance. The most common form worldwide is considered to be merosin-deficient muscle dystrophy type 1A, called MDC1A (due to laminin- α 2 defects as a result of LAMA2 gene mutation), accounting for 30-40% of total cases of CMD. The exact molecular and clinical diagnoses, respectively, are a prerequisite for the most effective treatment; sometimes orphan drugs exist for some rare diseases...
2018: Case Reports in Genetics
https://www.readbyqxmd.com/read/30105108/novel-trappc11-mutations-in-a-chinese-pedigree-of-limb-girdle-muscular-dystrophy
#4
Xike Wang, Yue Wu, Yuxia Cui, Nan Wang, Lasse Folkersen, Yuchuan Wang
Limb girdle muscular dystrophies (LGMDs) are a heterogeneous group of genetic myopathies leading primarily to proximal muscle weakness. It is caused by mutations at over 50 known genetic loci typically from mutations in genes encoding constituents of the sarcolemmal dystrophin complex or related functions. Herein we describe the case of two siblings with LGMD that were investigated using whole-exome sequencing followed by Sanger sequencing validation of a specific double-mutation in the TRAPPC11 gene. Further, from parental sequencing we determined the mode of transmission, a double heterozygous mutation at the maternal and paternal alleles...
2018: Case Reports in Genetics
https://www.readbyqxmd.com/read/30046498/a-novel-c-91dupg-jag1-gene-mutation-is-associated-with-early-onset-and-severe-alagille-syndrome
#5
Alejandra Del Pilar Reyes-de la Rosa, Gustavo Varela-Fascinetto, Constanza García-Delgado, Edgar Ricardo Vázquez-Martínez, Pedro Valencia-Mayoral, Marco Cerbón, Verónica Fabiola Morán-Barroso
Alagille syndrome (MIM 118450) is an autosomal dominant disorder characterized by paucity of intrahepatic bile ducts, chronic cholestasis, pulmonary stenosis, butterfly-like vertebrae, posterior embryotoxon, and dysmorphic facial features. Most cases are caused by JAG1 gene mutations. We report the case of a 2-year-old Mexican mestizo patient with Alagille syndrome, having exhibited jaundice and cholestatic syndrome as of three weeks of age. Sequencing analysis of the JAG1 gene revealed the novel heterozygous mutation c...
2018: Case Reports in Genetics
https://www.readbyqxmd.com/read/29854496/ocular-manifestations-of-a-novel-proximal-19p13-3-microdeletion
#6
L Swan, D Coman
Microdeletions at 19p13.3 are rarely reported in the medical literature with significant phenotypic variability. Among the reported cases, common clinical manifestations have included developmental delay, facial dysmorphism, and hypotonia. Herein we described a child with a de novo 19p13.3 microdeletion, proximal to the reported cases of 19p13.3 microdeletion/duplication, with ocular manifestations of bilateral ocular colobomata complicated with microphthalmos and cataract, associated with short stature. This case highlights the phenotypic heterogeneity of deletions in the 19p13...
2018: Case Reports in Genetics
https://www.readbyqxmd.com/read/29796325/patient-with-marfan-syndrome-and-a-novel-variant-in-fbn1-presenting-with-bilateral-popliteal-artery-aneurysm
#7
Ahmed Mohammad, Haytham Helmi, Paldeep S Atwal
We present a 43-year-old man with aortic root dilation, mitral valve prolapse, and marfanoid appearance, who presented with acute onset left leg pain. He underwent a Doppler ultrasound that revealed left popliteal artery aneurysm with thrombus. CT angiogram showed bilateral popliteal artery aneurysms. After repairing of his left popliteal artery aneurysm, he was sent for genetic evaluation. He was diagnosed with Marfan syndrome (MFS) based on the revised Ghent criteria and then underwent FBN1 sequencing and deletion/duplication analysis, which detected a novel pathogenic variant in gene FBN1 , denoted by c...
2018: Case Reports in Genetics
https://www.readbyqxmd.com/read/29682366/whole-exome-sequencing-and-molecular-modeling-of-a-missense-variant-in-tnfaip3-that-segregates-with-disease-in-a-family-with-chronic-urticaria-and-angioedema
#8
Antoneicka L Harris, Patrick R Blackburn, John E Richter, Jennifer M Gass, Thomas R Caulfield, Ahmed N Mohammad, Paldeep S Atwal
Chronic urticaria is a common condition characterized by recurrent hives lasting several weeks or months and is usually idiopathic. Approximately half of the individuals with chronic urticaria will present with episodes of angioedema that can be severe and debilitating. In this report, we describe a 47-year-old Hispanic male who presented initially for an evaluation of chronic hives following hospitalization due to hive-induced anaphylaxis. The individual had a history significant for urticaria and angioedema beginning in his early 30s...
2018: Case Reports in Genetics
https://www.readbyqxmd.com/read/29610688/prenatal-identification-and-molecular-characterization-of-two-simultaneous-de-novo-interstitial-duplications-of-chromosomal-regions-7p22-1p21-1-and-15q24-1
#9
Sabrina C Burn, Kali Swift, Maria Palmquist
The occurrence of simultaneous de novo chromosomal aberrations is extremely rare. Here, we describe two, previously unreported, simultaneous de novo interstitial duplications of chromosomes 7p and 15q. Amniocentesis was completed for a healthy gravida 4 para 3 woman due to her advanced maternal age and concurrent ultrasound findings of partial vermian agenesis, choroid-plexus cysts, and hypoplastic nasal bone. Cytogenetic analysis of cultured amniocytes by conventional chromosome analysis, comparative genomic hybridization, and fluorescence in situ hybridization revealed two interstitial duplications of the chromosomal regions 7p22...
2018: Case Reports in Genetics
https://www.readbyqxmd.com/read/29387497/a-novel-mutation-in-actg2-gene-in-mother-with-chronic-intestinal-pseudoobstruction-and-fetus-with-megacystis-microcolon-intestinal-hypoperistalsis-syndrome
#10
Julie R Whittington, Aaron T Poole, Eryn H Dutta, Mary B Munn
Background. A novel mutation in the ACTG2 gene is described in a pregnant patient followed up for chronic intestinal pseudoobstruction (CIPO) during pregnancy and her fetus with megacystis microcolon intestinal hypoperistalsis syndrome (MMIHS). Case. 24-year-old gravida 1 para 1 with CIPO and persistent nausea and vomiting in pregnancy, admitted at 28 weeks of gestation. Ultrasound revealed a fetus measuring greater than the 95th percentile, polyhydramnios, and megacystis. At delivery, the newborn was noted to have an enlarged bladder, microcolon, and intolerance of oral intake...
2017: Case Reports in Genetics
https://www.readbyqxmd.com/read/29333303/schinzel-giedion-syndrome-with-congenital-megacalycosis-in-a-turkish-patient-report-of-setbp1-mutation-and-literature-review-of-the-clinical-features
#11
Ozgul Bulut, Zeynep Ince, Umut Altunoglu, Sukran Yildirim, Asuman Coban
Schinzel-Giedion syndrome (SGS) is a rare autosomal dominant disorder that results in facial dysmorphism, multiple congenital anomalies, and an increased risk of malignancy. Recently, using exome sequencing, de novo heterozygous mutations in the SETBP1 gene have been identified in patients with SGS. Most affected individuals do not survive after childhood because of the severity of this disorder. Here, we report SETBP1 mutation confirmed by molecular analysis in a case of SGS with congenital megacalycosis.
2017: Case Reports in Genetics
https://www.readbyqxmd.com/read/29318063/novel-splicing-mutation-in-b3gat3-associated-with-short-stature-gh-deficiency-hypoglycaemia-developmental-delay-and-multiple-congenital-anomalies
#12
Samuel Bloor, Dinesh Giri, Mohammed Didi, Senthil Senniappan
B3GAT3 , encoding β -1,3-glucuronyltransferase 3, has an important role in proteoglycan biosynthesis. Homozygous B3GAT3 mutations have been associated with short stature, skeletal deformities, and congenital heart defects. We describe for the first time a novel heterozygous splice site mutation in B3GAT3 contributing to severe short stature, growth hormone (GH) deficiency, recurrent ketotic hypoglycaemia, facial dysmorphism, and congenital heart defects. A female infant, born at 34 weeks' gestation to nonconsanguineous Caucasian parents with a birth weight of 1...
2017: Case Reports in Genetics
https://www.readbyqxmd.com/read/29214085/-sox5-null-heterozygous-mutation-in-a-family-with-adult-onset-hyperkinesia-and-behavioral-abnormalities
#13
Michael Zech, Katharina Poustka, Sylvia Boesch, Riccardo Berutti, Tim M Strom, Wolfgang Grisold, Werner Poewe, Juliane Winkelmann
SOX5 encodes a conserved transcription factor implicated in cell-fate decisions of the neural lineage. SOX5 haploinsufficiency induced by larger genomic deletions has been linked to a recognizable pediatric syndrome combining developmental delay with intellectual disability, mild dysmorphism, inadequate behavior, and variable additional features including motor disturbances. In contrast to SOX5 -involving deletions, examples of pathogenic SOX5 small coding variations are sparse in the literature and have been described only in singular cases with phenotypic abnormalities akin to those seen in the SOX5 microdeletion syndrome...
2017: Case Reports in Genetics
https://www.readbyqxmd.com/read/29158924/methylmalonic-acidemia-with-novel-mut-gene-mutations
#14
Inusha Panigrahi, Savita Bhunwal, Harish Varma, Simranjeet Singh
A 5-year-old boy presented with recurrent episodes of fever, feeding problems, lethargy, from the age of 11 months, and poor weight gain. He was admitted and evaluated for metabolic causes and diagnosed as having methylmalonic acidemia (MMA). He was treated with vit B12 and carnitine supplements and has been on follow-up for the last 3 years. Mutation analysis by next generation sequencing (NGS), supplemented with Sanger sequencing, revealed two novel variants in the MUT gene responsible for MMA in exon 5 and exon 3, respectively...
2017: Case Reports in Genetics
https://www.readbyqxmd.com/read/29123929/palpitations-and-asthenia-associated-with-venlafaxine-in-a-cyp2d6-poor-metabolizer-and-cyp2c19-intermediate-metabolizer
#15
Sofia Garcia, Michael Schuh, Anvir Cheema, Herjot Atwal, Paldeep S Atwal
Cardiotoxicity has been extensively reported in venlafaxine (VEN) overdoses. Asthenia is also among the common side effects described for this antidepressant. VEN is metabolized mainly by CYP2D6 and to a minor extent by CYP2C19 to the major active metabolite O-desmethylvenlafaxine (ODV). Altered pharmacokinetic parameters in patients with polymorphisms in the CYP2D6 and CYP2C19 genes that result in decreased enzymatic activity have been documented. Here we describe a patient case of VEN associated palpitations and asthenia...
2017: Case Reports in Genetics
https://www.readbyqxmd.com/read/28948053/a-smarca2-mutation-in-the-first-case-report-of-nicolaides-baraitser-syndrome-in-latin-america-genotype-phenotype-correlation
#16
Ana Isabel Sánchez, Jorge Armando Rojas
Nicolaides-Baraitser syndrome (NCBRS) is a rare and well-recognized entity that was first described in 1993, with a prevalence that is currently not known. It is recognized as a distinctive entity, with some variability in its signs and symptoms. The most important characteristics include intellectual disability, peculiar facial features including sparse scalp hair, coarse facial features, low frontal hairline, and microcephaly, and seizures. Additional features may include epicanthic folds, thin upper lip vermilion with thick lower lip vermilion, skeletal abnormalities, and severe language impairment...
2017: Case Reports in Genetics
https://www.readbyqxmd.com/read/28928994/foxe1-mutation-screening-in-a-case-with-cleft-lip-hypothyroidism-and-thyroid-carcinoma-a-new-syndrome
#17
Hugo Mendieta-Zerón, Angélica Jiménez-Rosales, Carlos Jhovani Pérez-Amado, Silvia Jiménez-Morales
A 26-year-old woman is referred to the Internal Medicine consultation due to increases in laboratory studies associated with Papillary Thyroid Carcinoma (PTC) that was confirmed by histopathological studies. Her clinical history revealed that, at 3 months of age, she was successfully treated with surgery for cleft lip (CL) and at the age of 24 years was diagnosed with hypothyroidism. Single nucleotide polymorphisms (SNPs) in FOXE1 and its promoter regions have been associated with various etiologies related to the thyroid, including orofacial clefting, specially cleft palate (CP) and CL, hypothyroidism (HT), and thyroid cancer...
2017: Case Reports in Genetics
https://www.readbyqxmd.com/read/28928993/what-drives-embryo-development-chromosomal-normality-or-mitochondria
#18
A Bayram, I Elkhatib, A Arnanz, A Linan, F Ruiz, B Lawrenz, H M Fatemi
OBJECTIVE: To report the arrest of euploid embryos with high mtDNA content. DESIGN: A report of 2 cases. SETTING: Private fertility clinic. PATIENTS: 2 patients, 45 and 40 years old undergoing IVF treatment. INTERVENTIONS: Mature oocytes were collected and vitrified from two ovarian stimulations. Postthaw, survived mature oocytes underwent fertilization by intracytoplasmic sperm injection (ICSI)...
2017: Case Reports in Genetics
https://www.readbyqxmd.com/read/28884032/neurological-manifestations-of-x-linked-ichthyosis-case-report-and-review-of-the-literature
#19
William S Baek, Umut Aypar
A 5-year-old boy presented with mild autism and attention-deficit hyperactivity disorder (ADHD). Chromosomal microarray demonstrated a 1.7 Mb deletion at Xp22.31, which was consistent with X-linked ichthyosis (XLI). Further exam revealed dry, scaly skin on his abdomen and pretibial areas. Patients with mutations involving solely the STS gene or the recurrent ~2 Mb deletion may present with ADHD, whereas those with larger deletions including the NLGN4 gene can present with both ADHD and autism. However, our patient presented with mild autism in addition to ADHD despite having only the recurrent deletion without loss of NLGN4...
2017: Case Reports in Genetics
https://www.readbyqxmd.com/read/28819573/an-interstitial-4q-deletion-with-a-mosaic-complementary-ring-chromosome-in-a-child-with-dysmorphism-linear-skin-pigmentation-and-hepatomegaly
#20
J Carter, H Brittain, D Morrogh, N Lench, J J Waters
Interstitial deletions of 4q are rarely reported, vary in size, and have limited genotype-phenotype correlations. Here, genome-wide array CGH analysis identified a 21.6 Mb region of copy number loss at 4q12-q21.1 in a patient diagnosed with dysmorphism, linear skin pigmentation, and hepatomegaly. An additional small ring chromosome was detected in 5/30 cells examined via G-banding. Confirmation of the origin of the ring chromosome was obtained by FISH analysis which identified that the ring chromosome contained material from the deleted region of chromosome 4 and was therefore complementary to the 21...
2017: Case Reports in Genetics
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