RMND1-related leukoencephalopathy with temporal lobe cysts and hearing loss—another mendelian mimicker of congenital cytomegalovirus infection

Ulrick, Nicole, Goldstein, Amy, Simons, Cas, Taft, Ryan J., Helman, Guy, Pizzino, Amy, Bloom, Miriam, Vogt, Julie, Pysden, Karen, Diodato, Daria, Martinelli, Diego, Monavari, Ahmad, Buhas, Daniela, van Karnebeek, Clara D. M., Dorboz, Imen, Boespflug-Tanguy, Odile, Rodriguez, Diana, Tetreault, Martine, Majewski, Jacek, Bernard, Genevieve, Ng, Yi Shiau, McFarland, Robert and Vanderver, Adeline (2017) RMND1-related leukoencephalopathy with temporal lobe cysts and hearing loss—another mendelian mimicker of congenital cytomegalovirus infection. Pediatric Neurology, 66 59-62. doi:10.1016/j.pediatrneurol.2016.09.003

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Author Ulrick, Nicole
Goldstein, Amy
Simons, Cas
Taft, Ryan J.
Helman, Guy
Pizzino, Amy
Bloom, Miriam
Vogt, Julie
Pysden, Karen
Diodato, Daria
Martinelli, Diego
Monavari, Ahmad
Buhas, Daniela
van Karnebeek, Clara D. M.
Dorboz, Imen
Boespflug-Tanguy, Odile
Rodriguez, Diana
Tetreault, Martine
Majewski, Jacek
Bernard, Genevieve
Ng, Yi Shiau
McFarland, Robert
Vanderver, Adeline
Title RMND1-related leukoencephalopathy with temporal lobe cysts and hearing loss—another mendelian mimicker of congenital cytomegalovirus infection
Journal name Pediatric Neurology   Check publisher's open access policy
ISSN 1873-5150
0887-8994
Publication date 2017-01-01
Sub-type Article (original research)
DOI 10.1016/j.pediatrneurol.2016.09.003
Open Access Status File (Author Post-print)
Volume 66
Start page 59
End page 62
Total pages 4
Place of publication Philadelphia, PA, United States
Publisher Elsevier
Collection year 2018
Language eng
Formatted abstract
Background: Leukoencephalopathy with temporal lobe cysts may be associated with monogenetic conditions such as Aicardi–Goutières syndrome or RNASET2 mutations and with congenital infections such as cytomegalovirus. In view of the fact that congenital cytomegalovirus is difficult to confirm outside the neonatal period, excluding a Mendelian disorder is extremely relevant, changing family planning and medical management in affected families. We performed diagnostic testing in individuals with leukoencephalopathy with temporal lobe cysts without a definitive diagnosis of congenital cytomegalovirus infection.

Methods: We reviewed a large-scale biorepository of patients with unsolved leukodystrophies and identified two individuals with required for meiotic nuclear division 1 (RMND1) mutations and similar magnetic resonance imaging (MRI) features, including temporal lobe cysts. Ten additional subjects with confirmed RMND1 mutations were identified as part of a separate disease specific cohort. Brain MRIs from all 12 individuals were reviewed for common neuroradiological features.

Results: MRI features in RMND1 mutations included temporal lobe swelling, with rarefaction and cystic evolution, enlarged tips of the temporal lobes, and multifocal subcortical white matter changes with confluent periatrial T2 signal hyperintensity. A combination of these features was present in ten of the 12 individuals reviewed.

Conclusions: Despite the small number of reported individuals with RMND1 mutations, a clinically recognizable phenotype of leukoencephalopathy with temporal lobe swelling, rarefaction, and cystic changes has emerged in a subset of individuals. Careful clinical phenotyping, including for lactic acidosis, deafness, and severe muscle involvement seen in RMND1 mutation positive individuals, and MRI pattern recognition will be important in differentiating these patients from children with congenital infections like cytomegalovirus.
Keyword Cytomegalovirus
Genetics
Leukoencephalopathy
MRI pattern recognition
RMND1
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Institute for Molecular Bioscience - Publications
 
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