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Toshiyuki Yamamoto
Department School of Medicine(Tokyo Women's Medical University Hospital), School of Medicine Position Professor |
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| Article types | Original article |
| Language | English |
| Peer review | Peer reviewed |
| Title | Novel SLC16A2 mutations in patients with Allan-Herndon-Dudley syndrome. |
| Journal | Formal name：Intractable Rare Disease Research Abbreviation：Intractable Rare Dis Res ISSN code：21863644 |
| Domestic / Foregin | Foregin |
| Volume, Issue, Page | 5(3),pp.214-217 |
| Author and coauthor | Shimojima K, Maruyama K, Kikuchi M, Imai A, Inoue K, Yamamoto T. |
| Authorship | Last author,Corresponding author |
| Publication date | 2016/08 |
| Summary | Allan-Herndon-Dudley syndrome (AHDS) is an X-linked disorder caused by impaired thyroid hormone transporter. Patients with AHDS usually exhibit severe motor developmental delay, delayed myelination of the brain white matter, and elevated T3 levels in thyroid tests. Neurological examination of two patients with neurodevelopmental delay revealed generalized hypotonia, and not paresis, as the main neurological finding. Nystagmus and dyskinesia were not observed. Brain magnetic resonance imaging demonstrated delayed myelination in early childhood in both patients. Nevertheless, matured myelination was observed at 6 years of age in one patient. Although the key finding for AHDS is elevated free T3, one of the patients showed a normal T3 level in childhood, misleading the diagnosis of AHDS. Genetic analysis revealed two novel SLC16A2 mutations, p.(Gly122Val) and p.(Gly221Ser), confirming the AHDS diagnosis. These results indicate that AHDS diagnosis is sometimes challenging owing to clinical variability among patients. |
| DOI | 10.5582/irdr.2016.01051 |
| PMID | 27672545 |