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2017 ; 7
(1
): 67-71
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Apert syndrome with S252W FGFR2 mutation and characterization using Phenomizer:
An Indian case report
#MMPMID28316926
Kunwar F
; Tewari S
; Bakshi SR
J Oral Biol Craniofac Res
2017[Jan]; 7
(1
): 67-71
PMID28316926
show ga
Human genetic disease needs differential diagnosis to optimize clinical
management, enable prenatal detection, and genetic counselling. The current
methods of robust DNA sequencing also require next generation phenotyping to
match with for better interpretation of genotypic and phenotypic heterogeneity
commonly observed. We report use of human ontology based phenotypic
characterization with Phenomizer that gives statistical score for possible
diagnoses based on which, the gene mutation was studied. A case of
craniosynostosis which refers to a group of syndromes characterized by a
premature fusion of skull was studied. The phenotypic features viz, dental
crowding and dental malocclusion, bulbous nose, downslanted palpebral fissures,
radial deviation of thumb, syndactyly of fingers, macrocephaly, and oxycephaly
were entered to query the web-based tool Phenomizer which indicated high
probability of mutation in FGFR2 gene. The proband, a 13-year-old male born to
non-consanguineous parents showed mutation on FGFR2 gene at c.755C>G indicative
of Apert syndrome. Apert syndrome is one of the most severe craniosynostosis
syndromes with two possible mutations in the exon IIIa of FGFR2 gene reported in
majority of the cases. This case study shows the importance of Phenomizer and
molecular genetic analysis in differential diagnosis of genetic diseases.