Abstract
Background: Hypomyelination with atrophy of the basal ganglia and cerebellum (H-ABC) is a neurodegenerative disease with neurodevelopmental delay, motor, and speech regression, pronounced extrapyramidal syndrome, and sensory deficits due to TUBB4A mutation. In 2017, a severe variant was described in 16 Roma infants due to mutation in UFM1.
Objective: The objective of this study is to expand the clinical manifestations of H-ABC due to UFM1 mutation and suggest clues for clinical diagnosis.
Methodology: Retrospective analysis of all 9 cases with H-ABC due to c.-273_-271delTCA mutation in UFM1 treated during 2013-2020 in a Neuropediatric Ward in Plovdiv, Bulgaria.
Results: Presentation is no later than 2 months with inspiratory stridor, impaired sucking, swallowing, vision and hearing, and reduced active movements. By the age of 10 months, a monomorphic disease was observed: microcephaly (6/9), malnutrition (5/9), muscle hypertonia (9/9) and axial hypotonia (4/9), progressing to opisthotonus (6/9), dystonic posturing (5/9), nystagmoid ocular movements (6/9), epileptic seizures (4/9), non-epileptic spells (3/9). Dysphagia (7/9), inspiratory stridor (9/9), dyspnea (5/9), bradypnea (5/9), apnea (2/9) were major signs. Vision and hearing were never achieved or lost by 4-8 mo. Neurodevelopment was absent or minimal with subsequent regression after 2-5 mo. Brain imaging revealed cortical atrophy (7/9), atrophic ventricular dilatation (4/9), macrocisterna magna (5/9), reduced myelination (6/6), corpus callosum atrophy (3/6) and abnormal putamen and caput nuclei caudati. The age at death was between 8 and 18 mo.
Conclusion: Roma patients with severe encephalopathy in early infancy with stridor, opisthotonus, bradypnea, severe hearing and visual impairment should be tested for the Roma founder mutation of H-ABC in UFM1.
Keywords: H-ABC, Roma, UFM1, infant encephalopathy, extrapyramidal stridor, paroxysmal.
[PMID: 12372733]
[http://dx.doi.org/10.1016/j.ajhg.2013.03.018] [PMID: 23582646]
[http://dx.doi.org/10.1093/brain/awu110] [PMID: 24785942]
[http://dx.doi.org/10.1212/WNL.0000000000004578] [PMID: 28931644]
[http://dx.doi.org/10.1093/brain/awy135] [PMID: 29868776]
[http://dx.doi.org/10.1096/fj.201901751R] [PMID: 31914610]
[http://dx.doi.org/10.1016/j.ajhg.2016.06.030] [PMID: 27545681]
[http://dx.doi.org/10.1016/j.ajhg.2016.06.020] [PMID: 27545674]
[http://dx.doi.org/10.1186/s12881-017-0466-8] [PMID: 28965491]
[http://dx.doi.org/10.1684/epd.2018.0981] [PMID: 30078785]
[http://dx.doi.org/10.1016/j.ejmg.2018.06.009] [PMID: 29902590]
[http://dx.doi.org/10.1371/journal.pone.0149039] [PMID: 26872069]
[PMID: 26707546]
[http://dx.doi.org/10.4103/2249-4847.109247] [PMID: 24027744]
[PMID: 16363272]
[http://dx.doi.org/10.1177/000348948209100420] [PMID: 7114725]
[http://dx.doi.org/10.1186/s40733-015-0009-z] [PMID: 27965763]
[http://dx.doi.org/10.3233/NPM-190332] [PMID: 31985477]
[http://dx.doi.org/10.1097/00005537-200312000-00028] [PMID: 14660926]
[http://dx.doi.org/10.1016/j.braindev.2005.04.005] [PMID: 16485335]
[PMID: 23789017]
[http://dx.doi.org/10.1093/brain/121.2.243] [PMID: 9549503]
[http://dx.doi.org/10.1136/adc.88.1.75] [PMID: 12495971]
[http://dx.doi.org/10.1001/archotol.1996.01890180020007] [PMID: 8639291]
[http://dx.doi.org/10.1016/S1474-4422(19)30143-7] [PMID: 31307818]
[http://dx.doi.org/10.1016/j.cell.2020.02.017] [PMID: 32160526]
[http://dx.doi.org/10.1080/14737175.2020.1699060] [PMID: 31829048]
[http://dx.doi.org/10.1016/j.tcb.2019.09.005] [PMID: 31703843]