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Alekri A, Busehail M, Rhayel N, Almosawi SM. XXXYY variant of Klinefelter syndrome: A case report. Int J Health Sci (Qassim) 2023; 17:39-45. [PMID: 37151746 PMCID: PMC10155245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2023] Open
Abstract
This case report is about a 19-month-old boy, product of an in vitro fertilization twin pregnancy and born to young non-consanguineous parents, who presented with speech and motor developmental delay. On genetic evaluation, he was found to have the exceedingly rare variant 49, XXXYY of Klinefelter syndrome. Given the rarity of this condition and the limited literature available, this case report will surely add value to the literature.
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Affiliation(s)
- Ali Alekri
- Department of Pediatrics, Salmaniya Medical Complex, Manama, Kingdom of Bahrain
| | - Maryam Busehail
- Department of Pediatrics, Salmaniya Medical Complex, Manama, Kingdom of Bahrain
| | - Noorhan Rhayel
- Department of Pediatrics, Salmaniya Medical Complex, Manama, Kingdom of Bahrain
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Hovnik T, Zitnik E, Avbelj Stefanija M, Bertok S, Sedej K, Bancic Silva V, Battelino T, Groselj U. An Adolescent Boy with Klinefelter Syndrome and 47,XXY/46,XX Mosaicism: Case Report and Review of Literature. Genes (Basel) 2022; 13:genes13050744. [PMID: 35627128 PMCID: PMC9141365 DOI: 10.3390/genes13050744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/21/2022] [Accepted: 04/22/2022] [Indexed: 02/01/2023] Open
Abstract
Klinefelter syndrome is the most commonly reported sex chromosome abnormality. It is heavily underdiagnosed due to the substantial variability of clinical presentations but is generally characterized by small, firm testes, hypergonadotropic hypogonadism, and the absence of spermatogenesis. Most patients with Klinefelter syndrome have a 47,XXY genotype. If they present with mosaicism, two different cell lines are usually identified, an aneuploid 47,XXY cell line and a normal male 46,XY cell line. There are very few cases of 47,XXY mosaicism with the additional female cell line 46,XX described in the literature. We report a case of an adolescent with the male phenotype and a rare variant mosaic 47,XXY/46,XX karyotype who presented with painless bilateral gynaecomastia. 47,XXY and 46,XX mosaic cell lines were identified with GTG-banding and further characterized using fluorescent in situ hybridization. We summarized the available clinical presentations of reported male patients with 47,XXY/46,XX mosaicism. To improve the clinical management and quality of life in individuals with rare and cryptic genomic imbalances, the genetic diagnosis would need to be extended to atypical cases.
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Affiliation(s)
- Tinka Hovnik
- Clinical Institute for Special Laboratory Diagnostics, University Children’s Hospital, UMC, 1000 Ljubljana, Slovenia;
- Institute of Biochemistry and Molecular Genetics, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Eva Zitnik
- Department of Pediatric Endocrinology, Diabetes and Metabolic Diseases, University Children’s Hospital, UMC, 1000 Ljubljana, Slovenia; (E.Z.); (M.A.S.); (S.B.); (K.S.); (V.B.S.); (T.B.)
| | - Magdalena Avbelj Stefanija
- Department of Pediatric Endocrinology, Diabetes and Metabolic Diseases, University Children’s Hospital, UMC, 1000 Ljubljana, Slovenia; (E.Z.); (M.A.S.); (S.B.); (K.S.); (V.B.S.); (T.B.)
- Department of Pediatrics, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Sara Bertok
- Department of Pediatric Endocrinology, Diabetes and Metabolic Diseases, University Children’s Hospital, UMC, 1000 Ljubljana, Slovenia; (E.Z.); (M.A.S.); (S.B.); (K.S.); (V.B.S.); (T.B.)
- Department of Pediatrics, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Katarina Sedej
- Department of Pediatric Endocrinology, Diabetes and Metabolic Diseases, University Children’s Hospital, UMC, 1000 Ljubljana, Slovenia; (E.Z.); (M.A.S.); (S.B.); (K.S.); (V.B.S.); (T.B.)
| | - Vesna Bancic Silva
- Department of Pediatric Endocrinology, Diabetes and Metabolic Diseases, University Children’s Hospital, UMC, 1000 Ljubljana, Slovenia; (E.Z.); (M.A.S.); (S.B.); (K.S.); (V.B.S.); (T.B.)
| | - Tadej Battelino
- Department of Pediatric Endocrinology, Diabetes and Metabolic Diseases, University Children’s Hospital, UMC, 1000 Ljubljana, Slovenia; (E.Z.); (M.A.S.); (S.B.); (K.S.); (V.B.S.); (T.B.)
- Department of Pediatrics, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Urh Groselj
- Department of Pediatric Endocrinology, Diabetes and Metabolic Diseases, University Children’s Hospital, UMC, 1000 Ljubljana, Slovenia; (E.Z.); (M.A.S.); (S.B.); (K.S.); (V.B.S.); (T.B.)
- Department of Pediatrics, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia
- Correspondence: ; Tel.: +386-1-522-9235
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