• David I Sandberg, J Gordon McComb, and Mark D Krieger.
• Division of Neurosurgery, Childrens Hospital, Los Angeles, California, USA.
• Neurosurgery. 2005 Jul 1; 57 (1 Suppl): 100-6; discussion 100-6.

ObjectiveTo assess the treatment of progressive multiloculated hydrocephalus by craniotomy for microsurgical fenestration of cerebrospinal fluid (CSF) compartments to minimize the number of ventricular catheters.MethodsWe studied 33 pediatric patients who underwent craniotomies for fenestration of progressive multiloculated hydrocephalus between 1989 and 2003. In 20 of 33 patients, hydrocephalus was attributed to intraventricular hemorrhage associated with prematurity. Twenty-three of 33 patients had previous central nervous system infections. Craniotomy was typically performed via a posterior parietal approach. Communication between bilateral supratentorial loculated compartments and posterior fossa compartments was achieved. Surgical and neurological outcomes were assessed.ResultsFenestration of loculated CSF spaces was performed successfully in all patients. No new neurological deficits were noted after surgery, and no patients required intraoperative blood transfusions. CSF infections within 3 months after surgery occurred in 4 of 33 patients. Over a median follow-up period of 3.7 years (range, 1.5 mo to 8.7 yr), 19 of 33 patients required additional fenestration procedures. The number of repeat fenestration procedures ranged from one to six, and a total of 47 additional fenestrations were performed in these 19 patients. The majority of patients (n = 25) ultimately required shunt systems with only one ventricular catheter. The neurological status of these patients was extremely poor both before and after surgery. Twenty-nine of 33 patients were severely delayed, and four were mildly delayed.ConclusionFenestration of multiloculated CSF compartments can enable most patients to function with a single ventricular catheter shunt system. Neurological status remains poor in this patient population.

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