Isolated posterior fossa hypertension and brainstem compression caused by entrapped Dandy-Walker cyst: a case report

Lateral ventricular shunting alone is often considered to be adequate treatment for hydrocephalus caused by Dandy-Walker syndrome. A patient is presented in whom progressive spastic tetraparesis and signs of severe brainstem compression developed due to an entrapped posterior fossa cysts, in spite of an adequately functioning lateral ventricular shunt. Addition of a cystoperitoneal shunt resulted in rapid resolution of symptoms and deficits. This case illustrates that potentially fatal brainstem compression and dangerous posterior fossa hypertension may develop if the posterior fossa cyst does not communicate with the lateral ventricules, where the shunt is placed

Neurosurgical management of intraventricular haemorrhage in preterm infants

A review of intraventricular haemorrhage [IVH] diagnosed in 103 preterm infants from 1983 to 1993 describes the presenting features and management of this condition. In this 10-year period, 37 infants with IVH developed post-haemorrhagic hydrocephalus [PHH], defined as ventriculomegaly, raised intracranial pressure and increasing head circumference. PHH was treated by external ventricular drainage and/or ventriculo- peritoneal shunting; but other drainage procedures like lumbar punctures and subcutaneous ventricular reservoir were used occasionally. Relative indications, merits and demerits of these various surgical options is discussed and results summarised. High incidence of neuro-developmental handicap and its correlation with the grade of haemorrhage and PHH is emphasized. External ventricular drainage [EVD] was found to be an effective and safe therapy for rapidly progressive PHH and increased intracranial pressure. Ultimate outcome depended mainly on the grade of haemorrhage, severity of PHH and promptness of its neurosurgical management

Surgical management of Chiari malformation and syringomyelia: experience in 14 cases

Our experience with 14 patients afflicted with symptomatic Chiari malformation and syringomyelia, who were treated at King Khalid University Hospital between 1983 and 1990, is analyzed with reference to presentation, management, operative findings, and outcome. Patients with associated myelomeningocele, tethered cord, and spinal cord tumors were excluded from this series. The wide variations in natural history and clinical findings are emphasized. Neuroradiological studies included plain roentgenograms, myelograms, metrizamide-enhanced computed tomograms, and more recently magnetic resonance imaging scans. Posterior fossa decompression was the standard operation; other surgical procedures included syringosubarachnoid shunt, ventriculoperitoneal shunt, transoral odontoid resection, and terminal ventriculostomy. Four patients experienced definite improvement following surgery; the condition in seven was unchanged, and three suffered worsening of the disorder despite operation