Non lethal Raine syndrome and differential diagnosis

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• 作者：Siham Chafai Elalaoui^a ; ^b ; ¹ ; ^{sihamgen@yahoo.fr" class="auth_mail" title="E-mail the corresponding author} ; Nada Al-Sheqaih^c ; ^d ; ¹ ; Ilham Ratbi^a ; Jill E. Urquhart^c ; ^d ; James O'Sullivan^c ; ^d ; Sanjeev Bhaskar^c ; Simon S. Williams^c ; Mustapha Elalloussi^e ; Jaber Lyahyai^a ; Leila Sbihi^f ; Imane Cherkaoui Jaouad^a ; ^b ; Abdelhafid Sbihi^g ; William G. Newman^c ; ^d ; Abdelaziz Sefiani^a ; ^b
• 关键词：Raine syndrome ; Kohlschutter-Tonz syndrome ; FAM20C gene
• 刊名：European Journal of Medical Genetics
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：59
• 期：11
• 页码：577-583
• 全文大小：1642 K

文摘

Raine syndrome is a rare autosomal recessive bone dysplasia characterized by characteristic facial features with exophthalmos and generalized osteosclerosis. Amelogenesis imperfecta, hearing loss, seizures, and intracerebral calcification are apparent in some affected individuals. Originally, Raine syndrome was originally reported as a lethal syndrome. However, recently a milder phenotype, compatible with life, has been described. Biallelic variants inFAM20C, encoding aGolgi casein kinase involved in biomineralisation, have been identified in affected individuals.

We report here a consanguineous Moroccan family with two affected siblingsa girl aged 18 and a boy of 15years. Clinical features, including learning disability, seizures and amelogenesis imperfecta, initially suggested a diagnosis of Kohlschutter-Tonz syndrome. However,a novel homozygous FAM20Cvariantc.676T > A, p.(Trp226Arg) was identified in the affected siblings. Our report reinforces that Raine syndrome is compatible with life, and that mild hypophosphatemia and amelogenesis imperfecta are key features of the attenuated form.