The effect of trisomy 18 on transverse cerebellar diameter.

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

case_series · Level IV

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Abstract

The transverse cerebellar diameter was measured in 19 fetuses with trisomy 18. Eleven of the cerebellar measurements (57.9%) were greater than 2 SD below the mean for the patient's gestational age. If fetal biometry rather than last menstrual period were used to determine gestational age, four of the 19 (21.0%) cerebellar measurements were greater than 2 SD below the mean. Both intrauterine growth retardation and intrinsic central nervous system abnormalities associated with trisomy 18 appeared to affect cerebellar size.

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