Prenatal Diagnosis of the Arnold-Chiari Malformation with Spina Bifida : A Case Report

Abstract

A pregnant woman prenatally diagnosed with the Arnold-Chiari malformation with spina bifida at 18 weeks of gestation was reported. Sonographic evaluation was performed for routine screening. The sonographic findings demonstrated ventricular dilatation, a lemon-shaped cranium (lemon sign), obliteration of the cisterna magna (banana sign) and a dysraphic defect in the lower lumbar spine. The pregnancy was terminated. Postnatal finding confirmed the diagnosis.