Fetal hemivertebra: a rare form of 18q deletion prenatal presentation

The 18q deletion is a rare condition with several described features. A common phenotype includes short stature, microcephaly, facial defects, small feet, intellectual disability and hypotonia. We present a rare case of a fetus with del18q22.1q23 whose diagnosis was obtained by amniocentesis after a routine ultrasound at 20 weeks, where a hemivertebra was detected. Congenital hemivertebra is infrequent and is rarely associated with chromosomal anomalies. Expectant management can be advocated in isolated hemivertebra. This report shows that a hemivertebra can be an isolated prenatal finding in del18 so it is important to screen for, and exclude, chromosomal anomalies.