与托列洛-凯里面部表型重叠的6q近端缺失:产前检查结果、临床病程、鉴别诊断及文献综述

Proximal Deletion of 6q Overlapping with Toriello-Carey Facial Phenotype: Prenatal Findings, Clinical Course, Differential Diagnosis, and Review.

作者信息

Catena Sofía, Aracena Mariana, Pizarro Óscar, Espinoza Karena, Lay-Son Guillermo

机构信息

Centro de Genética y Genómica, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile.

Genetics Unit, Hospital Dr. Luis Calvo Mackenna, Santiago, Chile.

出版信息

Mol Syndromol. 2017 Dec;9(1):15-21. doi: 10.1159/000484427. Epub 2017 Nov 29.

Abstract

Proximal deletion of 6q is a relatively rare chromosomal abnormality. Reported patients have deletions of different sizes but share partial overlap and present with similar clinical features, and some of them were described prior to the introduction of chromosome microarrays. We describe a male patient with prenatal sonographic findings of nuchal edema, intrauterine growth restriction, renal pelvis dilatation, and oligohydramnios. At birth, facial dysmorphism, retro/micrognathia, a short and wide neck as well as cardiovascular and renal anomalies were noted. His clinical evolution has been marked by failure to thrive, severe developmental delay, and cognitive impairment. The diagnosis of Toriello-Carey syndrome (TCS) was based on his "gestalt." aCGH identified a de novo proximal deletion of 17 Mb in 6q (6q12q14.3). Deletion 6q13q14 seems to be responsible for the main facial features and should be considered within the differential diagnosis of TCS.

摘要

6q近端缺失是一种相对罕见的染色体异常。已报道的患者缺失片段大小各异,但存在部分重叠且具有相似的临床特征,其中一些患者在染色体微阵列技术应用之前就已被描述。我们描述了一名男性患者,其产前超声检查发现有颈部水肿、宫内生长受限、肾盂扩张和羊水过少。出生时,发现有面部畸形、小颌/下颌后缩、短而宽的颈部以及心血管和肾脏异常。他的临床病程以生长发育迟缓、严重发育延迟和认知障碍为特征。根据其“整体表现”诊断为托列洛-凯里综合征(TCS)。阵列比较基因组杂交(aCGH)检测到6q(6q12q14.3)有一个17 Mb的新生近端缺失。6q13q14缺失似乎是主要面部特征的病因,在TCS的鉴别诊断中应予以考虑。

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