Technical advances in neurosurgery follow a general philosophy favouring less invasive means of managing surgical disease. We describe a patient with a symptomatic type I Chiari malformation managed by posterior fossa decompression using endoscopic techniques. Technical considerations, including drawbacks of the procedure, are discussed.

Cerebral computed tomography (CT) is the primary imaging modality in the investigation of suspected cerebellar degeneration. A case is presented in which an inaccurate clinical and radiologic diagnosis of olivo-pontocerebellar degeneration resulted from CT imaging demonstrating loss of cerebellar substance. Subsequent clinical recognition of downbeat nystagmus led to a diagnosis of Chiari malfo...

We report a child with osteopetrosis, oxycephaly and Chiari type I malformation who presented with raised intracranial pressure. During cranial expansion surgery the patient developed sudden cardiac arrest which we believe was probably related to the Chiari malformation. The case highlights a previously unrecognized association between osteopetrosis, craniosynostosis and a persistently open fon...

Two cases of aneurysmal malformations of the vein of Galen with later spontaneous thrombosis are reported. Angiograms before thrombosis in both cases showed mural type aneurysmal malformations of the vein of Galen with slow arteriovenous shunts and associated stagnation of contrast in the venous sac secondary to severe outflow restriction. Based on these angiographic findings, the patients were...

Herniation of the hindbrain outside of the setting of intracranial hypertension, trauma, and brain tumors is an uncommon phenomenon with estimated incidence of less than 1%. In the late 1890's, Hans Chiari, a German pathologist, classified hindbrain herniation into three forms. This classification was then extended to include six types. We reviewed the current literature for the proposed embryo...

M. Farhoud, A. L. Wentland, O. Wieben, J. L. Klaers, W. F. Block, Y. Jung, A. Roldan, and V. M. Haughton Dept. of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States, Dept. of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States, Dept. of Electrical Engineering, University of Wisconsin School of...