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Favilla BP, Burssed B, Yamashiro Coelho ÉM, Perez ABA, de Faria Soares MDF, Meloni VA, Bellucco FT, Melaragno MI. Minimal Critical Region and Genes for a Typical Presentation of Langer-Giedion Syndrome. Cytogenet Genome Res 2022; 162:46-54. [PMID: 35290978 DOI: 10.1159/000522034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 01/17/2022] [Indexed: 11/19/2022] Open
Abstract
Langer-Giedion syndrome (LGS) is caused by a contiguous deletion at 8q23q24, characterized by exostoses, facial, ectodermal, and skeletal anomalies, and, occasionally, intellectual disability. LGS patients have been diagnosed clinically or by routine cytogenetic techniques, hampering the definition of an accurate genotype-phenotype correlation for the syndrome. We report two unrelated patients with 8q23q24 deletions, characterized by cytogenomic techniques, with one of them, to our knowledge, carrying the smallest deletion reported in classic LGS cases. We assessed the pathogenicity of the deletion of genes within the 8q23q24 region and reviewed other molecularly confirmed cases from the literature. Our findings suggest a 3.2-Mb critical region for a typical presentation of the syndrome, emphasizing the contribution of the TRPS1, RAD21, and EXT1 genes' haploinsufficiency, and facial dysmorphisms as well as bone anomalies as the most frequent features among patients with LGS. We also suggest a possible role for the CSMD3 gene, whose deletion seems to contribute to central nervous system anomalies. Since studies performing such correlation for LGS patients are limited, our data contribute to improving the ge-notype-phenotype characterization for LGS patients.
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Affiliation(s)
- Bianca Pereira Favilla
- Department of Morphology and Genetics, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Bruna Burssed
- Department of Morphology and Genetics, Universidade Federal de São Paulo, São Paulo, Brazil
| | | | | | | | - Vera Ayres Meloni
- Department of Morphology and Genetics, Universidade Federal de São Paulo, São Paulo, Brazil
| | | | - Maria Isabel Melaragno
- Department of Morphology and Genetics, Universidade Federal de São Paulo, São Paulo, Brazil
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Hazan F, Korkmaz HA, Yararbaş K, Wuyts W, Tükün A. Trichorhinophalangeal syndrome type II presenting with short stature in a child. ARCH ARGENT PEDIATR 2018; 114:e403-e407. [PMID: 27869420 DOI: 10.5546/aap.2016.eng.e403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Accepted: 05/19/2016] [Indexed: 11/12/2022]
Abstract
Trichorhinophalangeal syndrome type II (TRPSII) (synonym: Langer-Giedon syndrome) is a rare autosomal dominant contiguous gene syndrome, resulting from a microdeletion encompassing the EXT1 and the TRPS1 gene at 8q24 (MIM#150230). This syndrome combines the clinical features of two autosomal dominant disorders, trichorhinophalangeal syndrome type I (MIM#190350) and hereditary multiple osteochondromas type I (MIM # 133700). TRPSII is characterized by sparse scalp hair, a long nose with a bulbous tip, long flat philtrum, cone-shaped epiphyses of the phalanges, retarded bone age in infancy and multiple cartilaginous osteochondromas. We report a Turkish patient who had the clinical features and skeletal signs of TRPSII in whom a 13.8Mb deletion in 8q23.1- 8q24.13 was detected.
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Affiliation(s)
- Filiz Hazan
- Dr. Behcet Uz Children Disease and Surgery Training, Izmir, Turkey.,Research Hospital, Department of Genetics, Izmir, Turkey
| | - Hüseyin A Korkmaz
- Dr. Behcet Uz Children Disease and Surgery Training, Izmir, Turkey.,Research Hospital, Department of Pediatric Endocrinology, Izmir, Turkey.
| | - Kanay Yararbaş
- Duzen laboratory Groups, Department of Genetics, Ankara, Turkey
| | - Wim Wuyts
- Department of Medical Genetics, Antwerp University Hospital, Belgium
| | - Ajlan Tükün
- Ankara University Faculty of Medicine, Department of Medical Genetics, Ankara, Turkey
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Ruiz-Botero F, Pachajoa H. [Langer-Giedion syndrome with 8q23.1-q24.12 deletion diagnosed by comparative genomic hybridization]. ARCH ARGENT PEDIATR 2016; 114:e228-32. [PMID: 27399022 DOI: 10.5546/aap.2016.e228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 01/18/2016] [Indexed: 11/12/2022]
Abstract
The 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-q24.11 and mainly affects genes TRPS1, RAD21, and EXT1. This syndrome is characterized by the presence of multiple osteochondromas in limbs, hypertrichosis, and facial phenotype that includes sparse scalp hair, large laterally protruding ears, a long nose with a bulbous tip. We report the case of a Colombian patient with finding of an 8q23.1-q24.12 deletion by comparative genomic hybridization array technique and classical clinical findings, being the first case reported in Colombia.
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Affiliation(s)
- Felipe Ruiz-Botero
- Centro de Investigaciones en Anomalías Congénitas y Enfermedades Raras (CIACER), Facultad de Salud, Universidad Icesi, Cali, Colombia.
| | - Harry Pachajoa
- Fundación Clínica Valle del Lili, Centro de Investigaciones en Anomalías Congénitas y Enfermedades Raras (CIACER), Facultad de Salud, Universidad Icesi, Cali, Colombia
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Li Q, Zhang Z, Yan Y, Xiao P, Gao Z, Cheng W, Su L, Yu K, Xie H, Chen X, Jiang Q, Li L. Annular pancreas in Trichorhinophalangeal syndrome type II with 8q23.3-q24.12 interstitial deletion. Mol Cytogenet 2015; 8:95. [PMID: 26673557 PMCID: PMC4678473 DOI: 10.1186/s13039-015-0201-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 12/09/2015] [Indexed: 11/25/2022] Open
Abstract
Background Trichorhinophalangeal syndrome type II (TRPS II, OMIM # 150230) is a rare autosomal dominant genetic disorder characterized by craniofacial and skeletal abnormalities. Loss of functional copies of the TRPS1 gene at 8q23.3 and the EXT1 gene at 8q24.11 are considered to be responsible for the syndrome. Case Presentation Herewith, we report an 8-year-old girl with sparse scalp hair, bulbous nose, thin upper lip, broad eyebrows, phalangeal abnormalities of both hands/toes, multiple exostoses, mild intellectual impairment and severe malnutrition. In addition, the patient also had annular pancreas, a rare co-existing feature in patients with TRPS II. Conclusions A contiguous 5.47 Mb deletion involving 8q23.3-q24.12 was detected by array comparative genomic hybridization (aCGH), leading to haploinsufficiency of 10 protein coding genes, 1 long non-coding RNA and 1 microRNA. Quantitative PCR (qPCR) examination confirmed half-reduced DNA copy of the patient and normal expression of both parents, indicating a de novo origin of the deletion and complete penetrance of the mutation.
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Affiliation(s)
- Qi Li
- Department of Pediatric Surgery, Capital Institute of Pediatrics, No. 2 Yabao Rd, Beijing, 100020 China
| | - Zhen Zhang
- Department of Pediatric Surgery, Capital Institute of Pediatrics, No. 2 Yabao Rd, Beijing, 100020 China
| | - Yuchun Yan
- 2Department of Radiology, Capital Institute of Pediatrics Affiliated Children's Hospital, Beijing, China
| | - Ping Xiao
- Department of Pathology, Capital Institute of Pediatrics Affiliated Children's Hospital, Beijing, China
| | - Zhijie Gao
- Department of Neurology, Capital Institute of Pediatrics Affiliated Children's Hospital, Beijing, China
| | - Wei Cheng
- Department of Surgery, Beijing United Family Hospital, Beijing, China ; Department of Paediatrics and Surgery, Faculty of Medicine, Nursing and Health Sciences, Monash University, Victoria, Australia
| | - Lin Su
- Reproductive Medicine Center, Clinical College of PLA Affiliated Anhui Medical University, Hefei, China
| | - Kaihui Yu
- Department of Pathophysiology, School of Preclinical Sciences, Guangxi Medical University, Nanning, China
| | - Hua Xie
- Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Xiaoli Chen
- Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Qian Jiang
- Department of Medical Genetics, Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Long Li
- Department of Pediatric Surgery, Capital Institute of Pediatrics, No. 2 Yabao Rd, Beijing, 100020 China
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