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Predicting postresection hydrocephalus in pediatric patients with posterior fossa tumors
Jay Riva-Cambrin1, Allan S Detsky, Maria Lamberti-Pasculli
1Department of Neurosurgery, Primary Children's Medical Center, University of Utah, Salt Lake City, Utah 84113, USA. jay.riva-cambrin@hsc.utah.edu
Insights
A new prediction rule helps identify children at high risk for hydrocephalus after posterior fossa tumor surgery. This tool aids in surgical planning and patient counseling, potentially reducing unnecessary interventions.
Area of Science:
- Pediatric Neurosurgery
- Oncology
- Clinical Prediction Modeling
Background:
- Hydrocephalus affects approximately 30% of children post-posterior fossa tumor resection.
- Prophylactic endoscopic third ventriculostomy is suggested to reduce this risk.
- A predictive tool is needed to identify at-risk patients and optimize care.
Purpose of the Study:
- To develop and validate a preoperative clinical prediction rule for postresection hydrocephalus in children with posterior fossa tumors.
- To aid in surgical planning and patient counseling by stratifying risk.
Main Methods:
- A derivation cohort of 343 children (1989-2003) was used to generate the Canadian Preoperative Prediction Rule for Hydrocephalus.
- Multivariate methods identified significant predictors.
- The rule was validated on an independent cohort of 111 patients.
Main Results:
- Key predictors include young age (<2 years), papilledema, moderate-to-severe hydrocephalus, cerebral metastases, and tumor type.
- A score of >= 5 indicated high risk.
- The rule showed predictive accuracy in both derivation and validation cohorts, with adjusted probabilities of 0.59 (high-risk) and 0.14 (low-risk) in the validation set.
Conclusions:
- The Preoperative Prediction Rule for Hydrocephalus enables better risk stratification for pediatric patients.
- It facilitates informed patient counseling and surgical decision-making.
- High-risk patients may benefit from selective preoperative cerebrospinal fluid diversion.
Object:
Approximately 30% of children with posterior fossa tumors exhibit hydrocephalus after tumor resection. Recent literature has suggested that prophylactic endoscopic third ventriculostomy diminishes the risk of this event. Because the majority of patients will not have postoperative hydrocephalus, a preoperative clinical prediction rule that identifies patients at high or low risk for postresection hydrocephalus would be helpful to optimize the care of these children.
Methods:
The authors evaluated a derivation cohort of 343 consecutive children with posterior fossa tumors who underwent treatment between 1989 and 2003. Multivariate methods were used on these data to generate the Canadian Preoperative Prediction Rule for Hydrocephalus. The rule's estimated risk of postresection hydrocephalus was compared with risk observed in 111 independent patients in the validation cohort.
Results:
Variables identified as significant in predicting postresection hydrocephalus were age < 2 years (score of 3), papilledema (score of 1), moderate to severe hydrocephalus (score of 2), cerebral metastases (score of 3), and specific estimated tumor pathologies (score of 1). Patients with scores > or = 5 were deemed as high risk. Predicted probabilities for the high- and low-risk groups were 0.73 and 0.25, respectively, from the derivation cohort, and 0.59 and 0.14 after prevalence adjustment compared with the observed values of 0.42 and 0.17 in the validation cohort.
Conclusions:
A patient's score on the Preoperative Prediction Rule for Hydrocephalus will allow improved patient counseling and surgical planning by identifying patients at high risk of developing postresection hydrocephalus. These patients might selectively be exposed to the risks of preresection CSF diversion to improve outcome.
