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BACKGROUND: There are pathological conditions in which intracranial hypertension and patent basal cisterns in computed tomography coexist. These situations are not well recognized, which could lead to diagnostic errors and improper management. METHODS: We present a retrospective case series of patients with traumatic brain injury, subarachnoid hemorrhage, and cryptococcal meningitis who were treated at our intensive care unit. Criteria for deciding placement of an external lumbar drain were (1) intracranial hypertension refractory to osmotherapy, hyperventilation, neuromuscular blockade, intravenous anesthesia, and, in some cases, decompressive craniectomy and (2) a computed tomography scan that showed open basal cisterns and no mass lesion. RESULTS: Eleven patients were studied. Six of the eleven patients treated with controlled lumbar drainage are discussed as illustrative cases. All patients developed intracranial hypertension refractory to maximum medical treatment, including decompressive craniectomy in Four of the eleven cases. Controlled external lumbar drainage led to immediate and sustained control of elevated intracranial pressure in all patients, with good neurological outcomes. No brain herniation, intracranial bleeding, or meningitis was detected during this procedure. CONCLUSIONS: Our study provides preliminary evidence that in selected patients who develop refractory intracranial hypertension with patent basal cisterns and no focal mass effect on computed tomography, controlled lumbar drainage appears to be a therapeutic option. In our study there were no deaths or complications. Prospective and larger studies are needed to confirm our results.
RESUMEN
OBJECT: The aim of this work is to analyze the current management of hydrocephalus associated with posterior fossa (PF) tumors. METHODS: The personal perspectives of experienced pediatric neurosurgeons were presented at a virtual round table. DISCUSSION: Preoperative hydrocephalus has been reported in about 80% of patients with PF tumors and postoperative treatment is required for persistent or progressive hydrocephalus in about 25-30% of the cases. Preoperative management includes external ventricular drainage (EVD), endoscopic third ventriculostomy (ETV), shunt insertion, and no treatment at all, while ETV and ventriculo-peritoneal (V-P) shunt are recommended as treatment after PF craniotomy. CONCLUSION: There is no consensus on the way hydrocephalus should be managed before, during, and after PF surgery. While awaiting prospective multicenter trials of various management schemes the perioperative management of hydrocephalus in the context of posterior fossa tumors should be considered as options.