Table 3.

Structural magnetic resonance imaging findings

Variable	d-TGA (n=111)	Referent (n=55)	P value*
	n (%)
Any abnormality	37 (33)	2 (4)	<.001
Focal or multifocal abnormality	26 (23)	0	<.001
Focal infarction or atrophy	7 (6)	0	.10
Brain mineralization/iron deposit	23 (21)	0	<.001
Diffuse abnormality	3 (3)	0	.55
Myelination delay	0	0	-
Ventriculomegaly	0	0	-
Abnormal T2 hyperintensities	3 (3)	0	.55
Generalized abnormality	0	0	-
Developmental abnormality	9 (8)	2 (4)	.34
Major malformation	0	0	-
Minor malformation†	9 (8)	2 (4)	.34

Values are counts and percentages.

^*Determined by Fisher’s exact tests.

^†Minor malformations include Chiari malformation (n=2), arachnoid cyst, cerebellar tonsillar ectopia, enlarged empty sella, enlarged perivascular space in right parietal lobe, gray matter heterotopia in right frontal lobe, right thalamic signal abnormality (possible gliosis vs. low grade tumor), and small right hippocampus in d-TGA group; and Chiari malformation and developmental venous anomaly in right parietal lobe in referent group.