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2014 ; 2014
(ä): 424796
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The analysis of genetic aberrations in children with inherited neurometabolic and
neurodevelopmental disorders
#MMPMID24949445
Szyma?ska K
; Szcza?uba K
; Lugowska A
; Obersztyn E
; Radkowski M
; Nowakowska BA
; Ku?mierska K
; Tryfon J
; Demkow U
Biomed Res Int
2014[]; 2014
(ä): 424796
PMID24949445
show ga
Inherited encephalopathies include a broad spectrum of heterogeneous disorders.
To provide a correct diagnosis, an integrated approach including genetic testing
is warranted. We report seven patients with difficult to diagnose inborn
paediatric encephalopathies. The diagnosis could not be attained only by means of
clinical and laboratory investigations and MRI. Additional genetic testing was
required. Cytogenetics, PCR based tests, and array-based comparative genome
hybridization were performed. In 4 patients with impaired language abilities we
found the presence of microduplication in the region 16q23.1 affecting two
dose-sensitive genes: WWOX (OMIM 605131) and MAF (OMIM 177075) (1 case), an
interstitial deletion of the 17p11.2 region (2 patients further diagnosed as
Smith-Magenis syndrome), and deletion encompassing first three exons of Myocyte
Enhancer Factor gene 2MEF2C (1 case). The two other cases represented progressing
dystonia. Characteristic GAG deletion in DYT1 consistently with the diagnosis of
torsion dystonia was confirmed in 1 case. Last enrolled patient presented with
clinical picture consistent with Krabbe disease confirmed by finding of two
pathogenic variants of GALC gene and the absence of mutations in PSAP. The
integrated diagnostic approach including genetic testing in selected examples of
complicated hereditary diseases of the brain is largely discussed in this paper.