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KIAA0753-related skeletal ciliopathy: a ninth case, extending the phenotype and reporting a novel variant.
Clinical Dysmorphology ( IF 0.7 ) Pub Date : 2021-05-19 , DOI: 10.1097/mcd.0000000000000373
Ataf H Sabir 1 , Jameela Sheikh 2 , Vasantha Gowda 3 , Colin Wallis 4 , Surendra Singham 5 , Dipalee Durve 6 , Alessandra Cocca 7 , Muriel Holder-Espinasse 8 , Melita Irving 8
Affiliation  

KIAA0753-related skeletal ciliopathy is a recently described recessive disorder causing skeletal dysplasia and overlapping features of certain ciliopathies; Joubert, Jeune and Oro-facial-digital syndromes. We describe a ninth case that expands the phenotype; a 10-year-old girl with rhizomelic short stature (-5.6 SD), macrocephaly, developmental delay, CNS anomalies (thin corpus callosum, bilateral ventriculomegaly), cone-rod dystrophy, nystagmus, mild conductive hearing loss and recurrent chest infections secondary to confirmed ciliary dyskinesia. Testing for FGFR3 achondroplasia-related hotspots and mucopolysaccharidosis were negative. Whole-exome sequencing, aged eight, via skeletal dysplasia panel analysis and subsequent whole-genome sequencing (via the 100,000 genomes project) found no cause. WGS data reanalysis using exomiser uncovered compound heterozygous pathogenic KIAA0753 variants (frameshift and splice site). Further clinical and radiological surveys were consistent with the expected phenotype. We discuss the emerging phenotype of this uncommon disorder. This report details the sixth published case of skeletal dysplasia in all cases of KIAA0753-related disease and the first case to describe a novel c.1830-2A>G splice variant. Our case is the eldest woman reported to date (aged ten years) and the only known case to report associated hearing loss, leg-length discrepancy, pectus carinatum, respiratory ciliary dyskinesia and late-onset (9 years old) neuro-degenerative regression.

中文翻译:

KIAA0753 相关骨骼纤毛病:第九例,扩展表型并报告一种新的变异。

KIAA0753 相关骨骼纤毛病是最近描述的一种隐性疾病,导致骨骼发育不良和某些纤毛病的重叠特征;Joubert、Jeune 和 Oro-facial-digital 综合征。我们描述了扩展表型的第九个案例;一名 10 岁女孩,根茎状身材矮小 (-5.6 SD)、巨头畸形、发育迟缓、中枢神经系统异常(胼胝体薄、双侧脑室扩大)、锥杆营养不良、眼球震颤、轻度传导性听力损失和继发于确诊为纤毛运动障碍。FGFR3 软骨发育不全相关热点和粘多糖贮积症的检测结果为阴性。8 岁的全外显子组测序,通过骨骼发育不良面板分析和随后的全基因组测序(通过 100,000 基因组项目)没有发现任何原因。使用 exomiser 进行的 WGS 数据再分析发现了复合杂合致病性 KIAA0753 变异(移码和剪接位点)。进一步的临床和放射学调查与预期的表型一致。我们讨论了这种罕见疾病的新表型。本报告详细介绍了所有 KIAA0753 相关疾病病例中已发表的第六例骨骼发育不良病例,以及第一个描述新型 c.1830-2A>G 剪接变体的病例。我们的病例是迄今为止报告的最年长女性(10 岁),也是唯一已知的报告相关听力损失、腿长差异、鸡胸、呼吸纤毛运动障碍和迟发性(9 岁)神经退行性退化的病例。进一步的临床和放射学调查与预期的表型一致。我们讨论了这种罕见疾病的新表型。本报告详细介绍了所有 KIAA0753 相关疾病病例中已发表的第六例骨骼发育不良病例,以及第一个描述新型 c.1830-2A>G 剪接变体的病例。我们的病例是迄今为止报告的最年长女性(10 岁),也是唯一已知的报告相关听力损失、腿长差异、鸡胸、呼吸纤毛运动障碍和迟发性(9 岁)神经退行性退化的病例。进一步的临床和放射学调查与预期的表型一致。我们讨论了这种罕见疾病的新表型。本报告详细介绍了所有 KIAA0753 相关疾病病例中已发表的第六例骨骼发育不良病例,以及第一个描述新型 c.1830-2A>G 剪接变体的病例。我们的病例是迄今为止报告的最年长女性(10 岁),也是唯一已知的报告相关听力损失、腿长差异、鸡胸、呼吸纤毛运动障碍和迟发性(9 岁)神经退行性退化的病例。
更新日期:2021-05-23
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