· 538 ·doi:10.3969/j.issn.1000-3606.2019.07.014
临床儿科杂志 第 37 卷第 7 期 2019 年 7 月 J Clin Pediatr Vol.37 No.7 Jul. 2019TGFBR2基因突变致Loeys-Dietz综合征1例报告
姜永生 张小鸽
(陕西西安 710061)西北妇女儿童医院
摘要:方法 回顾分析1例Loeys-Dietz综合征患儿 目的 探讨Loeys-Dietz综合征的临床特点及其相关致病基因。结果 男性患儿,的临床资料,并复习相关文献。6月龄,面容特殊,双眼内陷、眼距增宽、双眼外斜视、下颌短小,腭弓高、“先天性马蹄内翻足”;悬雍垂分裂,全身肌张力低,四肢远端关节松弛,指趾细长;生后2周诊断心脏彩超示主动脉窦瘤结论 主动脉瘤形成、(p.His362Arg)形成;基因检测示TGFBR2基因c.1085A>G杂合变异,确诊Loeys-Dietz综合征。眼距过宽以及悬雍垂裂,并结合致病基因突变可确诊Loeys-Dietz综合征。
关键词: Loeys-Dietz综合征; TGFBR2基因; 突变
Loeys-Dietz syndrome caused by mutation in TGFBR2 gene: a case report JIANG Yongsheng, ZHANG Xiaoge (Northwest Women and Children's Hospital, Xi’an 710061, Shanxi, China)
Abstract: Objective To explore the clinical characteristics and related pathogenic genes of Loeys-Dietz syndrome. Method The clinical data of Loeys-Dietz syndrome in a child were retrospectively analyzed and the related literature was reviewed. Results A 6-month-old boy was characterized with special facial features (enophthalmos, hypertelorism, exotropia, short mandible, high palatal arch and bifid uvula) and other features (lower muscular tension, relaxed distal joints and spider-like fingers/toes). He was diagnosed with talipes equinovarus 2 weeks after birth. Color Doppler echocardiography indicated the formation of aortic sinus aneurysm, and gene detection showed the heterozygous variation of c.1085A>G (p.His362Arg) in TGFBR2 gene. The diagnosis of Loeys-Dietz syndrome was confirmed. Conclusion Loeys-dietz syndrome can be diagnosed based on the aortic aneurysm formation, hypertelorism and bifid uvula, combined with pathogenic gene mutation.
Key words: Loeys-Dietz syndrome; TGFBR2 gene; mutation
(Loeys-Dietz syndrome,Loeys-Dietz 综合征LDS)是一种罕见的常染色体显性遗传性结缔组织病,典型的临床表现包括主动脉瘤形成、眼距过宽以及悬雍垂(Marfan syndrome,与马凡综合征MFS)相比,裂[1]。
LDS患者主动脉瘤或夹层的临床进展更为迅猛,常以猝死为首发症状,因此症状前诊断具有重要的临床意义[2]。现回顾分析近期诊断的1例LDS患儿临床资料,并复习相关文献。1 临床资料
男性患儿,6月龄,发现精神运动发育迟缓3个月入院。3个月前发现患儿不能竖头,几乎无追声、追物,发声少,逗之不笑,经3个月康复治疗后发育情况改善,现竖头稳,肢体活动增多,追光、追声较灵活,有主动抓物意识,咿呀发声增多,能逗笑,但俯卧位不能撑起前胸,不能撑坐。患儿系第3胎,38周足月顺产,
通信作者:张小鸽 电子信箱:282913718@qq.com
出生体质量3700 g。生后2周在骨科诊断为先天性马(图1),蹄内翻足予手法按摩、石膏管型固定,并矫形(图1)鞋治疗。40日龄时因手指及足趾细长疑诊为马凡综合征。门诊行心脏B超检查,大血管内径未见明(主动脉窦部11 mm,,显异常肺动脉9 mm)动脉导(1 mm)。管未闭父母及2个姐姐无特殊外貌及心血管疾病史。入院体格检查:脉搏110次/min,血压93/ 73 mmHg,体质量8 kg,身长71 cm,头围45 cm;皮肤厚度、弹性未见异常;面容特殊,双眼内陷、眼距增宽、双眼外斜视、下颌短小,腭弓高、悬雍垂分裂;双肺呼吸音清;心音有力,律齐,心前区可闻及2/6级收缩期柔和吹风样杂音,不传导;全身肌张力低,四肢远端关节松弛,手指及足趾细长,双食指屈曲位,双拇趾关节挛缩,拇指征、腕征均阴性。实验室检查:血串联质谱检测、尿有机酸气相质谱检测未见明显异常。染色(MRI)体核型分析:46,XY。头颅磁共振成像示双侧