Fig. 11
From: Non-visualisation of cavum septi pellucidi: implication in prenatal diagnosis?
a, b, c Pseudo-absence of CSP: cavum vergae. a Coronal ultrasound through the frontal horns demonstrates non-visualisation of the CSP. The patient was referred for fetal MRI to assess for associated anomalies. b Coronal T2-weighted MRI demonstrates prominent CSP (asterisk) and lateral displacement of CSP leaflets mimicking absent CSP. c Axial T2-weighted MRI demonstrates extension of prominent CSP posterior to foramen of Monro consistent with cavum vergae