The many faces of prenatal imaging diagnosis of primitive aqueduct obstruction

Fetal aqueductal stenosis: Prenatal diagnosis and intervention

“…Some may develop hydrocephalus gradually, while others develop it rapidly. In a small sample size of eight subjects, Rault and colleagues described three patterns of the prenatal sonographic appearance of FAS: rapid progression in the third trimester, progressive ventriculomegaly in the second and third trimesters, and stable ventriculomegaly . In a recent retrospective study of 41 newborns with the postnatal diagnosis of isolated AS, 17 (41%) delivered vaginally, arguing against macrocephaly significant enough to preclude vaginal delivery in all cases .…”

“…This should prompt a search for prominence or dilation of third ventricular recesses, which can indicate early findings of AS, an indication for follow‐up imaging . Another helpful finding is identifying a dilated supra‐pineal recess as an early marker for obstruction caudal to the third ventricle . Consequent to increased intracranial pressure, findings such as parenchymal thinning with the development of thin cortical mantle and loss of intracranial extra‐axial spaces are noted (Figures and ) …”

Evaluación del cerebro fetal: nuevas herramienta

“…Esta evaluación cualitativa rápida aporta importante información sobre la existencia de al menos una porción del cuerpo calloso, y la simetría del sistema ventricular y de la zona periventricular, que puede ser asiento de patología del desarrollo cortical, hemorrágica o infecciosa (18,19) . Todo esto lo posiciona como una herramienta con potencial para la detección de holoprosencefalia (20,21) , anomalías comisurales (agenesia completa del cuerpo calloso, displasia septo-preóptica) (22)(23)(24)(25)(26)(27)(28) , esquisencefalia (29) y barotrauma (ventriculomegalia obstructiva) (30,31) .…”