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CEDNIK syndrome with phenotypic variability
Pediatric Dermatology, 2022AbstractCEDNIK syndrome is a rare autosomal recessive syndrome characterized by cerebral dysgenesis, neuropathy, ichthyosis, and keratoderma of which 25 cases from 19 families have been reported to date. It is a progressive neurodegenerative disorder caused by the loss‐of‐function pathogenic variant of the SNAP29 gene encoding a member of the SNARE ...
Arti Nanda, Tarek M. Karam, Atlal AlLafi
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Phenotypic Variability in Acquired and Idiopathic Dystonia
Movement Disorders Clinical Practice, 2023AbstractBackgroundTo date, a few studies have systematically investigated differences in the clinical spectrum between acquired and idiopathic dystonias.ObjectivesTo compare demographic data and clinical features in patients with adult‐onset acquired and idiopathic dystonias.MethodsPatients were identified from among those included in the Italian ...
Giovanni Defazio +44 more
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The phenotypic variability of diastrophic dysplasia
The Journal of Pediatrics, 1978To determine the relationship between so-called "diastrophic variant" and diastrophic dysplasia, four patients considered to have the variant condition were studied in detail and compared to 67 patients (including 17 sets of affected sibs) considered to have classical diastrophic dysplasia.
W A, Horton +7 more
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The effect of the environment on phenotypic variability
Proceedings of the Royal Society of London. Series B - Biological Sciences, 1958Abstract Mice were raised from birth to 4 weeks of age in three climatic chambers maintained at temperatures of 28 °C (‘hot’), 21 °C (‘temperate’) and 5 °C (‘cold’). Their individual weights were recorded at weeks 1, 2, 3 and 4, and analyzed for the sexes separately.
M R, ASHOUB +3 more
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Phenotypic Variability Induced by Parasites:
Parasitology Today, 1999The diversity of ways in which parasites can modify the host genotypic signal has been documented in recent years. For example, parasites can shift the mean value and increase the variance of phenotypic traits in host populations, or alter the phenotypic sex ratio of host populations, with several evolutionary implications.
R, Poulin, F, Thomas
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Variable Bone Phenotypes in Patients with Pseudohypoparathyroidism
Current Osteoporosis Reports, 2023Pseudohypoparathyroidism (PHP) is a disorder caused by mutations and/or epigenetic changes at the complex GNAS locus. It is characterized by hypocalcemia, hyperphosphatemia, and an elevated parathyroid hormone concentration secondary to the resistance of target tissues to the biological actions of parathyroid hormone.
Yan Wang, Chunyan Lu, Xiang Chen
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The variable phenotype of FXTAS
Neurology, 2005Fragile X syndrome (FXS) is the most common inherited cause of mental retardation. It is caused by an expansion of a CGG trinucleotide repeat in the 5′ untranslated region of the fragile X mental retardation gene, the FMR1 gene, on the X chromosome to more than 200 repeats (full mutation).
Christoph Kamm, Thomas Gasser
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Phenotypic variability in myotonia congenita
Muscle & Nerve, 2005AbstractMyotonia congenita is a hereditary chloride channel disorder characterized by delayed relaxation of skeletal muscle (myotonia). It is caused by mutations in the skeletal muscle chloride channel gene CLCN1 on chromosome 7. The phenotypic spectrum of myotonia congenita ranges from mild myotonia disclosed only by clinical examination to severe and
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Phenotypic variability in Meckel–Gruber syndrome
Clinical Genetics, 1990Five Bedouin sibs are described with Meckel‐Gruber syndrome (MGS), an autosomal recessive disorder with multiple abnormalities. Each affected sib manifested only two of the three cardinal signs of MGS: occipital encephalocele and polycystic kidneys, lacking polydactyly. The phenotypic variability of the MGS pleiotropic gene is briefly discussed.
T I, Farag +5 more
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