A female case of 5,10-methenyltetrahydrofolate synthetase deficiency with novel neuro-imaging abnormalities
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2022Author
Çavuşoglu, DilekKöse, Melis
Er, Esra
Elmas, Muhsin
Gençpınar, Pınar
Dündar, Nihal Olgaç
Aydın, Kürşad
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Çavuşoglu, D., Köse, M., Er, E., Elmas, M., Gençpınar, P., Dündar, N. O. ... Aydın, K. (2022). A female case of 5,10-methenyltetrahydrofolate synthetase deficiency with novel neuro-imaging abnormalities. Brain and Development, 44(9), 640-644. http://doi.org/10.1016/j.braindev.2022.05.008Abstract
Background: Folate metabolism disorders can affect various organ systems, including the nervous system. 5,10-methenyltetrahydrofolate synthetase deficiency is a rare cerebral folate deficiency in which MTHFS activity is disrupted with low-normal cerebrospinal fluid (CSF) 5,10-methenyltetrahydrofolate levels, while peripheral folate levels are normal. Case report: We present here a female patient with developmental delay, microcephaly, hypotonia, nystagmus, and seizure in which a distinct brain MRI and CT showed restricted diffusion in the bilateral parietal and occipital lobes, and calcifications of the bilateral putamen, globus pallidus, and caudate nucleus, and the bilateral parietal and occipital lobes. Laboratory tests revealed macrocytic anemia, increased homocysteine, low-normal CSF 5,10-methenyltetrahydrofolate, and low CSF folate, but normal serum vitamin B12 and folate levels. A whole exome sequencing analysis verified the diagnosis of 5,10-methenyltetrahydrofolate synthetase deficiency. Conclusions: We have added novel knowledge which is nystagmus and hypotonia in the clinical findings, the involvement and restriction of bilateral putamen, globus pallidus, parietal and occipital lobes, and calcification of the bilateral putamen, globus pallidus, caudate nucleus, and parietal and occipital lobes in neuroimaging images and also low CSF folate in the metabolic investigation with the patient in 5,10-methenyltetrahydrofolate synthetase deficiency.(c) 2022 The Japanese Society of Child Neurology Published by Elsevier B.V. All rights reserved.
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