Fetal arachnoid cyst: characteristics, management in pregnancy, and neurodevelopmental outcomes

Abstract

Arachnoid cysts are rarely found during the prenatal period and can exist in any part of the brain as extra-axial cysts. These cysts are usually found after the second trimester and should be differentiated from other types of brain cysts and tumors using ultrasonography and magnetic resonance imaging. Serial sonographic examinations are necessary to evaluate associated central nervous system (CNS) or extra-CNS anomalies and changes in size or shape during pregnancy. If there are other associated anomalies, prenatal genetic evaluations are strongly recommended. Surgical procedures are necessary after birth in approximately 30-60% of the patients. Most isolated cysts have favorable neurodevelopmental outcomes, although information on their prognosis is limited.

Radiological characteristics of the posterior fossa of the fetal skull and presentation of a rare case of antenatal screening for Dandy-Walker malformation using antenatal fetal ultrasound and MRI

“…Location in the posterior cerebral fossa is a differential diagnosis with Dandy Walker malformation ( Fig. 4 ) [ 5 ].

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Quiste aracnoideo intracraneal a causa de trauma craneoencefálico en paciente pediátrico. Reporte de caso

“…La ecografía prenatal de rutina es el primer método de detección de quistes intracanales fetales, visualizándose como lesiones anecoicas bien definidas (Hong et al, 2023). En el caso presentado, las ecografías prenatales realizadas no reportaron anomalías y el remodelado óseo se hizo evidente posterior al traumatismo en la misma región siendo confirmado el diagnóstico de quiste aracnoideo por medio de una tomografía.…”