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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 20:1647-1652 (10 1999)
© 1999 American Society of Neuroradiology

ARTICLE

Spontaneous Ventriculostomy: Report of Three Cases Revealed by Flow-Sensitive Phase-Contrast Cine MR Imaging

Alex Rovira^,a, Jaume Capellades^a, Elisenda Grivé^a, Maria A. Poca^a, Salvador Pedraza^a, Juan Sahuquillo^a and Alfonso Rodríguez-Baeza^a

^a From the Departments of Radiology, Magnetic Resonance Unit (I.D.I.) (A.R., J.C., E.G., S.P.) and Neurosurgery (M.A.P., J.S.), Vall d'Hebron University Hospitals, and the Morphological Science Department (A.R.B.), Autonomus University of Barcelona, Barcelona, Spain.

Summary: Spontaneous ventriculostomy is a rare condition that occurs with the spontaneous rupture of a ventricle, resulting in a communication between the ventricular system and the subarachnoid space. Three cases of spontaneous ventriculostomy through the floor of the third ventricle that occurred in cases of chronic obstructive hydrocephalus are presented. The communication was identified via flow-sensitive phase-contrast cine MR imaging. Spontaneous ventriculostomy is probably a result of a rupture of the normally thin membrane that forms the floor of the third ventricle and, with long-standing obstructive hydrocephalus, creates an internal drainage pathway that spontaneously compensates for the hydrocephalus.

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