fig 5.

Patient 39: hypogenesis of the corpus callosum (22 weeks' gestation).

A, Sagittal ssFSE image (∞/98/0.5) shows the genu and anterior body of the corpus callosum (arrow). The posterior body and splenium are absent.

B, Axial ssFSE image confirms the presence of the genu (white arrow). The cavum septi pellucidi (black arrows) is only seen when the genu and anterior callosal body are present. The absent splenium is apparent on this image, as the posterior interhemispheric fissure is continuous with the cavum.