# Operative Neurosurgery

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risk_stratification

see risk

Is the determination of quantitative or qualitative value of risk related to a concrete situation and a recognized threat (also called hazard). Quantitative risk assessment requires calculations of two components of risk (R):, the magnitude of the potential loss (L), and the probability (p) that the loss will occur. Acceptable risk is a risk that is understood and tolerated usually because the cost or difficulty of implementing an effective countermeasure for the associated vulnerability exceeds the expectation of loss.

Since preoperative risk assessment on the basis of standard anatomical imaging alone is often insufficient, noninvasive identification and visualization of eloquent areas in the preoperative work-up is becoming increasingly important in brain tumor surgery 1).

1)
Chang EF, Clark A, Smith JS, et al. Functional mapping–guided resection of low-grade gliomas in eloquent areas of the brain: improvement of long-term survival. J Neurosurg 2011;114(3):566-573.