The transverse cerebellar diameter in the second trimester is unaffected by Down syndrome.

Hill, L M; Rivello, D; Peterson, C; Marchese, S · Am J Obstet Gynecol · 1991

case_series · Level IV

Where this comes from

Abstract

Cerebellar hypoplasia is a consistent finding in necropsy studies of children and adults affected by Down syndrome. The transverse cerebellar diameter was measured in 23 second-trimester fetuses with Down syndrome. All the measurements were within the normal range for gestational age.

Medical subject headings