Neonatal Hemimegalencephaly Accompanying Band Heterotopia: Sonographic Finding and Correlation with MR Finding

ABSTRACT

There are many reports of hemimegalencephaly on MRI. However, there have been a few reports of sonographic diagnosis of the disease in a neonate. A one-day-old female infant was diagnosed as hemimegalencephaly accompanying band heterotopia on cranial sonography, which showed 4 a four-layered patterns of hypoechoic cortex, thick band-like hyperechoic subcortical white matter, inner hypoechoic heterotopia, and hyperechoic unmyelinated periventricular white matter. The sonographic patterns corresponded well with MRI findings on the second day of life. To the best of my knowledge, the author is the first to reports on the US findings and MR correlation of hemimegalencephaly.