**7. Post surgical evaluation**

**Remember:** Since the size of the ventricles, seen on CT or MRI after ETV, decreases more slowly than after shunt placement, in fact, ventriculomegaly after ETV can take weeks to reduce or persist [44].

G.Cinalli et al., established radiological criteria for the success of ETV: [45, 47–50].


## **7.1 Remember**


**Mortality:** 0.5–1.0% [44, 45, 52–54].
