Perinatal and short-term neonatal outcomes of posterior fossa anomalies

Abstract

Objective: To describe the perinatal and neonatal outcomes for fetuses with posterior fossa (PF) anomalies-mega-cisterna magna (MCM), persistent Blake's pouch (PBP) or the Dandy-Walker continuum (DWC)-using a new classification. Methods: 46 cases with PF anomaly diagnosed on ultrasound (US) between 16 and 28 weeks' gestation were included. The images were reviewed and classified as one of the following: MCM, PBP or DWC. Outcomes were obtained from patient records. Results: 30 cases with DWC, 6 with MCM, and 10 with PBP were identified. Associated anomalies were present in all groups, but more frequent in DWC. Agenesis of the corpus callosum and ventriculomegaly were more common in DWC than i..