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Clinical characterization of Lamb-Shaffer syndrome: a case report and literature review
Guo-Qing Zhu1,2, Ping Dong1, Dong-Yun Li1
1Child Health Care Department, Children's Hospital of Fudan University, Shanghai, China.
Background:
Lamb-Shaffer syndrome (LAMSHF, MIM 616,803) is a rare neurodevelopmental disorder due to haploinsufficiency of SOX5. Furthermore, studies about the clinical features of LAMSHF patients with same allele of c.1477C > T (p. R493*) are very limited.
Case Presentation:
We analyzed the phenotypes of one of our cases and two previously reported cases with c.1477C > T (p. R493*), and reviewed the correlating literature. A de novo heterozygous variation c.1477C > T (p. R493*) in SOX5 was identified in a 4 years and 2 months old boy with global development delay by trio-based whole exome sequencing. We compared our case and previously 2 cases reported with recurrent variation, the overlapping clinical features are global developmental delay or intellectual disability, language delay and scoliosis, but their other clinical characteristics are different.
Conclusions:
This study suggests that the clinical features of LAMSHF patients with recurrent variations in the SOX5 gene are different. It is suggested that the LAMSHF-related SOX5 gene should be screened and included as one of the candidate genes for neurodevelopmental disorders of unknown etiology.

