The absence of a definitive genetic test for the autosomal recessive condition Schinzel-Giedion syndrome is a significant handicap to the recognition of this disorder. Radiological features have been an important aspect of many of the published cases. In a series of six cases, we now establish a consistency among many of the radiological features in affected cases which will be an important diagnostic aid in identifying future cases. This is confirmed by reference to an extensive review of previously published instances of the syndrome. Moreover, the clinical data, including previously unpublished photographs, which we detail from our patients will assist in enhanced diagnosis in the future.
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http://dx.doi.org/10.1007/s00431-008-0683-4 | DOI Listing |
Hum Mol Genet
January 2025
Department of Human Genetics, McGill University, 3666 McTavish Street, Montreal, QC H3A 1Y2, Canada.
Many genes in the human genome encode proteins that are dosage sensitive, meaning they require protein levels within a narrow range to properly execute function. To investigate if clinically relevant variation in protein levels impacts the same downstream pathways in human disease, we generated cell models of two SETBP1 syndromes: Schinzel-Giedion Syndrome (SGS) and SETBP1 haploinsufficiency disease (SHD), where SGS is caused by too much protein, and SHD is caused by not enough SETBP1. Using patient and sex-matched healthy first-degree relatives from both SGS and SHD SETBP1 cases, we assessed how SETBP1 protein dosage affects downstream pathways in human forebrain progenitor cells.
View Article and Find Full Text PDFClin Cancer Res
November 2024
National Cancer Institute, Bethesda, MD, United States.
The management of children with syndromes associated with an increased risk of benign and malignant neoplasms is a complex challenge for healthcare professionals. The 2023 AACR Childhood Cancer Predisposition Workshop provided updated consensus guidelines on cancer surveillance in these syndromes, aiming to improve early detection, intervention, and reduce morbidity associated with such neoplasms. In this paper, we review several of the rare conditions discussed in this workshop.
View Article and Find Full Text PDFBMC Pediatr
May 2024
Department of Pediatrics, The First People's Hospital of Yunnan Province, 157 Jinbi Road, Xishan District, Kunming, 650032, Yunnan Province, China.
Schinzel-Giedion syndrome (SGS) is a severe multisystem disorder characterized by distinctive facial features, profound intellectual disability, refractory epilepsy, cortical visual impairment, hearing loss, and various congenital anomalies. SGS is attributed to gain-of-function (GoF) variants in the SETBP1 gene, with reported variants causing canonical SGS located within a 12 bp hotspot region encoding SETBP1 residues aa868-871 (degron). Here, we describe a case of typical SGS caused by a novel heterozygous missense variant, D874V, adjacent to the degron.
View Article and Find Full Text PDFMol Syndromol
March 2024
Immunopathology and Cancer Biomarkers Unit, Centro di Riferimento Oncologico di Aviano (CRO), IRCCS, Aviano, Italy.
Introduction: gene variants that decrease or eliminate protein activity have been associated with phenotypes characterized by speech apraxia and intellectual disabilities. This condition, distinctly separated from Schinzel-Giedion syndrome, is referred to as autosomal dominant mental retardation 29 (ADR29).
Case Presentation: In this report, we present the case of a 6-year-old male patient exhibiting fine and global motor skill impairments along with expressive language delay.
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