Antenatal imaging: A pictorial review

Figure 13  Alobar holoprosencephaly. 30-year-old, 21 wk of gestation. A: On ultrasonography, supratentorial cerebral structures are absent (thin arrows); B: There was bilateral hypotelorism-anophthalmia and a single orbital structure with exophytic extension from the midline (cyclopi) (thick arrow); C and D: The same patient also had a major cardiac anomaly (circle).