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Background: Pure partial trisomy 16q12.1q22.1 is a rare chromosome copy number variant (CNV). The primary clinical phenotypes associated with this syndrome include abnormal facial morphology, global developmental delay (GDD), short stature, and reported predisposing factors for atypical behavior, autism, the development of learning disabilities, and neuropsychiatric disorders. The dosage-sensitive genes associated with partial trisomy are not disclosed preventing to establish a genotype-phenotype correlation.
Methods: We report a case of a Chinese patient diagnosed with GDD and an abnormal facial shape, who was found to have partial trisomy 16 through karyotyping and high-throughput sequencing analysis. Karyotype and CNV tracing analyses were also conducted on the biological parents of the patient to assess for any chromosomal structural abnormalities. Additionally, we included 29 patients with pure partial trisomy 16q, reported in the DECIPHER database and the literature. We and performed a genotype-phenotype correlation analysis.
Results: The proband, a 2-year-old female, was found to have a de novo 21.96 Mb duplication located between 16q12.1q22.1, with no other deletions observed on other chromosomes, indicating a pure partial trisomy of 16q. Through genotype and phenotype analysis of 29 individuals, we found that patients with the duplicated region located at the distal region of 16q may exhibit more severe symptoms than those with duplication at the proximal region; however, no relationship was identified between phenotype and the size of the duplicated segment.
Conclusion: We report, for the first time, a patient with partial trisomy 16q validated by multiple genetic tests, including CNV-seq, whole exome sequencing (WES), and karyotyping. It is speculated that partial trisomy of 16q may be associated with continuous gene duplication. However, functional studies are necessary to identify the causative gene or critical region linked to duplication syndrome of chromosome 16q.
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http://dx.doi.org/10.1186/s12920-024-02059-3 | DOI Listing |
BMC Med Genomics
December 2024
Department of Pediatrics, Sichuan Provincial Woman's and Children's Hospital, The Affiliated Women's and Children's Hospital of Chengdu Medical College, Chengdu, China.
Background: Pure partial trisomy 16q12.1q22.1 is a rare chromosome copy number variant (CNV).
View Article and Find Full Text PDFAnn Surg
December 2024
Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.
Objective: The aim was to assess fertility, sexual function and sexual quality of life in males with Hirschsprung's disease (HSCR) in the Nordic countries with a cross-sectional study using self-reported validated questionnaires.
Summary Background Data: Data on fertility and sexual function in males with HSCR are limited.
Methods: This multi-center study targeted all males born between 1970-2003 who underwent pull-through surgery at a pediatric surgery center in Sweden, Denmark, Norway, or Finland.
Front Immunol
December 2024
Department of Maternal Infantile and Urological Sciences, Sapienza University of Rome, Rome, Italy.
While Trisomy X syndrome is typically characterized by developmental and cognitive variations, it is not commonly associated with immunodeficiencies. We report the unique case of a 6-year-old girl with Trisomy X presenting with selective IgA deficiency, challenging the conventional understanding of this chromosomal condition. The patient exhibited recurrent respiratory infections and gastrointestinal symptoms, evaluated in the context of her genetic background of Trisomy X and significantly low levels of IgA (0.
View Article and Find Full Text PDFPathol Res Pract
December 2024
Section of Pathology, Department of Medical Biotechnology, University of Siena, Siena, Italy. Electronic address:
Various aggressive lymphomas entities have been associated with immunodeficiency. To provide further evidence that also MYC-negative high-grade B-cell (formerly Burkitt-like) lymphoma with 11q aberrations comprises an immunodeficiency-related subtype, we here conducted a comprehensive pathological and genetic workup of a 25-year-old patient with this type of lymphoma and simultaneous papillary renal cell carcinoma. The patient developed both malignancies following extensive childhood immunosuppression and a kidney transplant.
View Article and Find Full Text PDFMol Cytogenet
December 2024
Department of Medical Genetics, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
The advent of non-invasive prenatal testing (NIPT) in the screening of fetal abnormalities has optimized prenatal care and decreased the rate of invasive diagnostic tests. In this retrospective descriptive study, we began with 1874 singleton pregnancies. After exclusion of some cases, the study cohort ended up with 1674 cases.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!