A Severe Case of Spondylometaphyseal Dysplasia Algerian Type with Two Mutations in COL2A1.

IF 0.4 Q4 PEDIATRICS Journal of pediatric genetics Pub Date : 2021-07-26 eCollection Date: 2023-12-01 DOI:10.1055/s-0041-1732474
Francisco Cammarata-Scalisi, Uta Matysiak, Colin E Willoughby, Gunda Ruzaike, Antonio Cárdenas Tadich, Maykol Araya Castillo, Carmen Zara-Chirinos, Ana Bracho, Andrea Avendaño, Houweyda Jilani, Michele Callea
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Abstract

Spondylometaphyseal dysplasia Algerian type (MIM no.: 184253) is an uncommon autosomal dominant skeletal dysplasia caused by heterozygous mutations in the COL2A1 gene (MIM no.: 120140). In this case based review, we reported a 5-year-old boy with short stature, severe dorsolumbar scoliosis, lumbar hyperlordosis, short trunk, and severe genu valgum . Radiological examination showed platyspondyly, irregular metaphyseal radiolucencies intermingled with radiodensities, and corner fractures. The patient has a c.3275G > A; p.Gly1092Asp mutation in exon 47 of the COL2A1 gene and a variant of unknown significance in c.1366-13C > A in intron 21. This latter sequence variant could partially or completely disrupt the natural splice acceptor site of intron 21/exon 22 in the COL2A1 gene leading to a potential modification of the phenotypic severity.

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一例患有两种 COL2A1 基因突变的阿尔及利亚型脊柱软骨发育不良症重症病例
脊柱骨骺发育不良阿尔及利亚型(MIM 编号:184253)是一种不常见的常染色体显性骨骼发育不良,由 COL2A1 基因(MIM 编号:120140)的杂合子突变引起。在本病例回顾中,我们报告了一名患有身材矮小、严重背腰椎侧弯、腰椎过度伸展、躯干短小和严重膝下畸形的 5 岁男孩。放射学检查显示,他患有板状软骨发育不良、不规则的骨骺放射状突起与放射状骨密度混杂在一起以及拐角骨折。患者的 COL2A1 基因第 47 号外显子中存在 c.3275G > A; p.Gly1092Asp 突变,内含子 21 中的 c.1366-13C > A 变异意义不明。后一种序列变异可能会部分或完全破坏 COL2A1 基因内含子 21/ 外显子 22 的天然剪接受体位点,从而导致表型严重程度的潜在改变。
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期刊介绍: The Journal of Pediatric Genetics is an English multidisciplinary peer-reviewed international journal publishing articles on all aspects of genetics in childhood and of the genetics of experimental models. These topics include clinical genetics, molecular genetics, biochemical genetics, medical genetics, dysmorphology, teratology, genetic counselling, genetic engineering, formal genetics, neuropsychiatric genetics, behavioral genetics, community genetics, cytogenetics, hereditary or syndromic cancer genetics, genetic mapping, reproductive genetics, fetal pathology and prenatal diagnosis, multiple congenital anomaly syndromes, and molecular embryology of birth defects. Journal of Pediatric Genetics provides an in-depth update on new subjects and current comprehensive coverage of the latest techniques used in the diagnosis of childhood genetics. Journal of Pediatric Genetics encourages submissions from all authors throughout the world. The following articles will be considered for publication: editorials, original and review articles, short report, rapid communications, case reports, letters to the editor, and book reviews. The aim of the journal is to share and disseminate knowledge between all disciplines in the field of pediatric genetics. This journal is a publication of the World Pediatric Society: http://www.worldpediatricsociety.org/ The Journal of Pediatric Genetics is available in print and online. Articles published ahead of print are available via the eFirst service on the Thieme E-Journals platform.
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