We report on a boy with speech delay, mental retardation, motor clumsiness, hyperactivity, dysmorphic facial features, brachytelephalangy and short stature. Electrocardiogram, echocardiography, renal ultrasound, electroencephalogram, fundoscopic exam and auditory brainstem responses were all normal. Brain magnetic resonance imaging showed a left temporal arachnoid cyst and a small pineal gland cyst. High resolution karyotype and FISH analysis detected a de nova duplication of the short arm of chromosome 20. A molecular characterization of the chromosomal anomaly was performed by array-CGH, confirming a 17.98 Mb duplication of the short arm of chromosome 20 associated with a small duplication on chromosome 3p, that was shown to be Maternally inherited. This is one of the few cases of de nova trisomy 20p with extensive workup, characterization at molecular level and close follow-up from the neonatal period to age 30 months. We also compared the phenotype of our patient with that previously reported in literature, therefore contributing to better define the trisomy 20p syndrome and helping pediatricians and geneticists to better counsel families about the developmental prognosis of these children. (C) 2013 Elsevier B.V. All rights reserved.
De novo trisomy 20p characterized by array comparative genomic hybridization: Report of a novel case and review of the literature / Bartolini L; Sartori S; Lenzini E; Rigon C; Cainelli E; Agrati C; Toldo I; Dona M; Trevisson E. - In: GENE. - ISSN 0378-1119. - 524:(2013), pp. 368-372. [10.1016/j.gene.2013.04.033]
De novo trisomy 20p characterized by array comparative genomic hybridization: Report of a novel case and review of the literature
Bartolini L;
2013
Abstract
We report on a boy with speech delay, mental retardation, motor clumsiness, hyperactivity, dysmorphic facial features, brachytelephalangy and short stature. Electrocardiogram, echocardiography, renal ultrasound, electroencephalogram, fundoscopic exam and auditory brainstem responses were all normal. Brain magnetic resonance imaging showed a left temporal arachnoid cyst and a small pineal gland cyst. High resolution karyotype and FISH analysis detected a de nova duplication of the short arm of chromosome 20. A molecular characterization of the chromosomal anomaly was performed by array-CGH, confirming a 17.98 Mb duplication of the short arm of chromosome 20 associated with a small duplication on chromosome 3p, that was shown to be Maternally inherited. This is one of the few cases of de nova trisomy 20p with extensive workup, characterization at molecular level and close follow-up from the neonatal period to age 30 months. We also compared the phenotype of our patient with that previously reported in literature, therefore contributing to better define the trisomy 20p syndrome and helping pediatricians and geneticists to better counsel families about the developmental prognosis of these children. (C) 2013 Elsevier B.V. All rights reserved.File | Dimensione | Formato | |
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