Perinatal Rapid Enlargement of Suprasellar-Prepontine Arachnoid Cyst: Report of Case and Literature Review

Arachnoid cysts are benign developmental anomalies representing 1% of all intracranial lesions. Suprasellar prepontine location of arachnoid cyst in the perinatal period has been reported in the perinatal period with the advent of prenatal imaging. A rare case of rapidly enlarging suprasellar prepontine arachnoid cyst diagnosed at 28 weeks on routine antenatal ultrasonographic and magnetic resonance imaging is presented. Rapid enlargement of the cyst near term led to endoscopic fenestration of the cyst and ventriculocystocisternostomy followed by ventriculoperitoneal shunt in the postnatal life. Serial imaging in the perinatal period led to early intervention with good postnatal outcome. We also review all cases of prenatal suprasellar prepontine arachnoid cyst mentioned in literature and discuss the management strategies.