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Table 5: Comparison between children with and without arthrogryposis regarding some of the brain abnormalities found on MRI^{^a}
Variables Arthrogryposis P^{^b}
No (n = 8) Yes (n = 4)
Decreased brain volume 6 (75.0%) 4 (100.0%) .515
Grade of brain volume decrease 
    Mild 1 (20.0%) 0 (0.0%) .876
    Moderate/severe 4 (80.0%) 3 (100.0%) 
Degree of cerebral damage .394
    Absent 1 (12.5%) 0 (0.0%) 
    Mild 2 (25.0%) 0 (0.0%) 
    Moderate 2 (25.0%) 0 (0.0%) 
    Severe 3 (37.5%) 4 (100.0%) 
Symmetry 6 (75.0%) 3 (75.0%) >.999
Cortical development abnormalities 
    Pachygyria 3 (37.5%) 3 (75.0%) .545
    Polymicrogyria 2 (25.0%) 0 (0.0%) .515
    Simplified gyral pattern 4 (50.0%) 3 (75.0%) .576
Corpus callosum >.999
    Normal 2 (25.0%) 0 (0.0%) 
    Hypogenesis 5 (62.5%) 3 (75.0%) 
    Hypoplasia 1 (12.5%) 1 (25.0%) 
Cortical and subcortical junction calcifications 7 (85.5%) 4 (100.0%) >.999
Basal ganglia calcifications 3 (37.5%) 3 (75.0%) .545
Periventricular calcifications 0 (0.0%) 3 (75.0%) .018^c
Brain stem calcifications 1 (12.5%) 3 (75.0%) .067
Cerebellum calcifications 0 (0.0%) 2 (50.0%) .091
Cerebellum or brain stem hypoplasia 2 (25.0%) 4 (100.0%) .061
Increased cisterna magna 8 (100.0%) 4 (100.0%) –
Delayed myelination 5 (50.0%) 4 (100.0%) .208
↵a Data are number of patients (%).
↵b P = Fisher Exact test.