title: 49, XXXXY syndrome with severe vesico-ureteral reflux and hydronephrosis: report of one case.
abstract: The 49, XXXXY syndrome was first reported in 1960. It represents a rare sex chromosome aneuploidy syndrome. Some consider it as the most severe variant of Klinefelter syndrome (47, XXY). The approximate incidence is 1 in 85,000 male births. The karyotype arises from maternal non-disjunction during both meiosis I and meiosis II. The clinical presentations of 49, XXXXY syndrome include mental deficiency, hypogonadism, severe speech delay, multiple skeletal anomalies, cardiac defects and characteristic facial features. It might be mistaken for Down syndrome and needs chromosome analysis for confirmation. According to literature review, urinary tract anomaly in association with 49, XXXXY syndrome was extremely rare. Here we report a case of 49, XXXXY with Down syndrome-like facial dysmorphism, who was found to have patent ductus arteriosus and hypotonia. Moreover, he also got grade V vesico-ureteral reflux, R't with hydronephrosis and urinary tract infection. We hope to remind clinicians to arrange chromosomal analysis if multiple congenital anomalies exist in a neonate. And remember to exclude congenital genitourinary tract anomaly if karyotype 49, XXXXY is diagnosed.
authors.affiliation: Department of Pediatrics, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.
authors.forename: Jenn-Tzong
authors.initials: JT
authors.lastname: Chang
authors.forename: Pao-Chin
authors.initials: PC
authors.lastname: Chiu
authors.forename: Ying-Yao
authors.initials: YY
authors.lastname: Chen
authors.forename: Mei-Chyn
authors.initials: MC
authors.lastname: Chao
authors.forename: Kai-Sheng
authors.initials: KS
authors.lastname: Hsieh
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics*; D041321:Chromosomes, Human, X / Q000235:genetics*; D004374:Ductus Arteriosus, Patent / Q000150:complications / Q000235:genetics; D005145:Face / Q000002:abnormalities; D017809:Fatal Outcome; D006801:Humans; D006869:Hydronephrosis / Q000150:complications*; D007231:Infant, Newborn; D007621:Karyotyping; D007668:Kidney / Q000002:abnormalities / Q000000981:diagnostic imaging; D008297:Male; D009123:Muscle Hypotonia / Q000150:complications; D012729:Sex Chromosome Aberrations; D025064:Sex Chromosome Disorders / Q000150:complications / Q000235:genetics; D013577:Syndrome; D014463:Ultrasonography; D014551:Urinary Tract / Q000002:abnormalities; D014552:Urinary Tract Infections / Q000150:complications; D014718:Vesico-Ureteral Reflux / Q000150:complications* / Q000175:diagnosis