The 18q deletion is a rare condition with several described features. A common phenotype includes short stature, microcephaly, facial defects, small feet, intellectual disability and hypotonia.We present a rare case of a fetus with del18q22.1q23 whose diagnosis was obtained by amniocentesis after a routine ultrasound at 20 weeks, where a hemivertebra was detected.Congenital hemivertebra is infrequent and is rarely associated with chromosomal anomalies. Expectant management can be advocated in isolated hemivertebra. This report shows that a hemivertebra can be an isolated prenatal finding in del18 so it is important to screen for, and exclude, chromosomal anomalies.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9923312 | PMC |
http://dx.doi.org/10.1136/bcr-2022-251914 | DOI Listing |
Mol Cytogenet
December 2024
Dipartimento di Bioscienze, Biotecnologie e Ambiente, Università degli Studi di Bari "Aldo Moro", Bari, Italy.
Ring chromosome 18 (r(18)) is a rare chromosomal abnormality characterized by the circular rearrangement of chromosome 18, which presents significant challenges in genotype-phenotype correlations due to variability in deletions across the 18p and 18q arms. We report the case of a pediatric patient with a de novo ring chromosome 18, diagnosed by karyotype analysis and confirmed by high-resolution SNP arrays. The patient exhibited pathogenic copy number variants (CNVs) in the 18p11.
View Article and Find Full Text PDFZhonghua Yi Xue Yi Chuan Xue Za Zhi
October 2024
Lianyungang Maternal and Child Health Care Hospital, Lianyungang, Jiangsu 222000, China.
Zhonghua Yi Xue Yi Chuan Xue Za Zhi
September 2024
Institute of Pediatric Medicine, Henan Provincial Key Laboratory of Children's Genetics and Metabolic Diseases, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, Henan 450018, China.
Objective: To clarify the genetic diagnosis of two children with ring chromosome 18 and explore their mechanisms and clinical phenotypes.
Methods: Two patients treated at the Children's Hospital of Henan Province respectively in June 2022 and March 2023 were selected as the study subjects. Genetic testing and diagnosis were carried out through copy number variation sequencing (CNV-seq), G-banded chromosomal karyotyping, and whole exome sequencing (WES).
J Clin Immunol
June 2024
Department of Child Health and Development, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan.
Patients with chromosome 18q deletion syndrome generally experience hypogammaglobulinemia. Herein, we describe two patients with chromosome 18q deletion syndrome who presented with late-onset combined immune deficiency (LOCID), which has not been previously reported. Patient 1 was a 29-year-old male with 18q deletion syndrome, who was being managed for severe motor and intellectual disabilities at the Yamabiko Medical Welfare Center for 26 years.
View Article and Find Full Text PDFAJNR Am J Neuroradiol
October 2024
From the Department of Diagnostic Imaging (P.M., H.B., M.S., S.B., P.K.), The Hospital for Sick Children, Toronto, Canada.
Background And Purpose: The abnormalities of the long arm of chromosome 18 (18q) constitute a complex spectrum. We aimed to systematically analyze their MR imaging features. We hypothesized that there would be variable but recognizable white matter and structural patterns in this cohort.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!