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[Genetic analysis of a child with acrodysostosis type 2].

OBJECTIVE
To analyze the clinical characteristics and genetic variation in a child with acrodysostosis type 2.


METHODS
The child has undergone history taking and physical examination. Genome DNA was extracted from peripheral blood samples from him and his parents. High-throughput sequencing was carried out. The result was verified by Sanger sequencing.


RESULTS
The 8-year-old boy presented with midface hypoplasia, hypertelorism, prominent nasal bridge, small and upturned nostrils, broad thumb and great toes, and brachydactyly of remaining fingers and toes. Genetic testing revealed that the child has carried a heterozygous c.1813T>C (p.Tyr605His) missense mutation of the PDE4D gene. The same mutation was not found in either parent and was unreported previously.


CONCLUSION
The child was diagnosed with acrodysostosis type 2 due to the novel mutation of the PDE4D gene.