Ehlers-Danlos syndrome (EDS) is a group of clinically and genetically heterogeneous inherited connective tissue disorders, characterized by skin hyperextensibility, poor wound healing, joint hypermobility and tissue friability. Since 1997 a new spectrum of novel rare EDS-variants has been described, among which is included the EDS kyphoscoliotic type, characterized by severe muscular hypotonia at birth, severe progressive kyphoscoliosis, osteopenia, fragile eyeballs and vascular fragility. This EDS variant is caused by mutations in the PLOD1 gene; however, a rare recessive variant that compromises the FKBP14 gene has been reported, with additional clinical findings that includes gross motor developmental delay, myopathy, hearing impairment and a normal ratio of lysyl pyridinoline to hydroxylysyl pyridinoline in urine.
View Article and Find Full Text PDFIntroduction: The ataxia telangiectasia syndrome (AT) is a genetic disease with an autosomal recessive inheritance pattern, with multisystem involvement and a broad clinical spectrum. It is caused by the mutation of the ATM gene, causing reduction or absence of the ATM proteinkinase, altering processes in the cell cycle, DNA repair and apoptosis. The objective of this article is to report the case of a patient with ataxia telangiectasia syndrome, caused by a mutation not previously reported in the literature.
View Article and Find Full Text PDFBackground: Pulmonary surfactant is a complex mixture of lipids and proteins. Mutations in surfactant protein-C, surfactant protein-D, and adenosine triphosphate-binding cassette subfamily A member 3 have been related to surfactant dysfunction and neonatal respiratory failure in full-term babies. Adenosine triphosphate-binding cassette subfamily A member 3 facilitates the transfer of lipids to lamellar bodies.
View Article and Find Full Text PDFBackground: Genetic disorders are a major cause in the etiology of cases with intellectual disability; however, analysis by a conventional technique such as cytogenetic karyotyping only allows the detection of chromosomal alterations in approximately 9.5 % of cases. The inclusion of new technologies such as high resolution microarray analysis has allowed the study of alterations in chromosomal segments that are less than 5 Mb in length; this has led to an increase in the diagnosis of these patients of up to 25 %.
View Article and Find Full Text PDFThe Langer-Giedion syndrome, also known as trichorhinophalangeal syndrome type II, is a hereditary multisystemic disease part of the group of contiguous gene deletion syndromes. The cause of this syndrome is a heterozygous deletion that involves the chromosomal region 8q23.3-q24.
View Article and Find Full Text PDF7q11.23 duplication syndrome is a disease caused by duplication of a region of chromosome 7 comprising 26 genes. The first case described in the literature was reported by Somerville et al.
View Article and Find Full Text PDFIntroduction: Microcephalic osteodysplastic primordial dwarfism is a syndrome characterized by the presence of intrauterine growth restriction, post-natal growth deficiency and microcephaly. Microcephalic osteodysplastic primordial dwarfism type II is the most distinctive syndrome in this group of entities. Individuals affected by this disease present at an adult height of less than 100 cm, a post-pubertal head circumference of 40 cm or less, mild mental retardation, an outgoing personality and bone dysplasia.
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