Department of Paediatrics and Adolescent Medicine, University of Hong Kong, Hong Kong, China.
Department of Paediatrics and Adolescent Medicine, University of Hong Kong, Hong Kong, China
BMJ Case Rep. 2020 Jul 22;13(7):e233037. doi: 10.1136/bcr-2019-233037.
We report a case of CHARGE syndrome with atypical phenotype and a novel mutation in the CHD7 gene. Laryngomalacia and swallowing difficulties are prominent features in this case. These are commonly found in patients with CHARGE syndrome and are well described in previous studies. However, with the traditional diagnostic criteria, diagnosis is difficult without the presence of coloboma or choanal atresia. Early diagnosis is possible with the aid of clinical genetics. The current diagnostic criteria would need to be broadened with the inclusion of pathogenic CHD7 variant status as a major criterion. Further research on the function of CHD7 gene may also give us more insight on the pathogenic mechanism of various clinical features of CHARGE syndrome.
我们报告了一例具有非典型表型的 CHARGE 综合征病例,该病例的 CHD7 基因突变是一种新突变。本例中,喉软骨软化和吞咽困难是突出的特征。这些在 CHARGE 综合征患者中很常见,在以前的研究中已有详细描述。然而,根据传统的诊断标准,如果没有出现眼眶缺损或后鼻孔闭锁,诊断是困难的。临床遗传学的辅助可以实现早期诊断。目前的诊断标准需要扩大,将致病性 CHD7 变异状态作为主要标准纳入其中。对 CHD7 基因功能的进一步研究也可能使我们对 CHARGE 综合征各种临床特征的发病机制有更深入的了解。