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Fetal arachnoid cyst of the quadrigeminal cistern in MRI and ultrasound.

Kusaka Y, Luedemann W, Oi S, Shwardfegar R, Samii M

Department of Neurosurgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shinbashi, Tokyo 105-8461, Japan. kusakayasuko@yahoo.co.jp

CASE: The authors report a fetus with an arachnoid cyst of the quadrigeminal cistern without hydrocephalus at 30 gestational weeks. DISCUSSION AND CONCLUSION: We reviewed the literature and could find only 62 reported cases of arachnoid cyst of the quadrigeminal cistern. We present a case without hydrocephalus diagnosed by combining ultrasound (US) and magnetic resonance imaging (MRI). The fetus, born by normal delivery, was followed up and did not show hydrocephalus for 1 year. This combined prenatal study, which uses US and MRI, helps in dispensing proper counseling to parents and assists the gynecologist and the neurosurgeon in the pre- and postnatal management of this condition.

Published 5 December 2005 in Childs Nerv Syst, 21(12): 1065-6.
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