ETV Success Score

The ETV Success Score (ETVSS)[^2] is a validated[^1] score for predicting the success rate of an endoscopic third ventriculostomy.

ETV Score

Points	Age	Etiology	Previous Shunt
0	1 month	postinfectious	Yes
10	1 month to 6 months	n/a	No
20	n/a	Myelomeningocele, intraventricular hemorrhage, non-tectal brain tumor	n/a
30	6 months to 1 year	aqueductal stenosis, tectal brain tumor, other	n/a
40	1 year to 10 years	n/a	n/a
50	≥ 10 years	n/a	n/a

To calculate the ETVSS, the points for age, etiology, and previous shunt are added together. The resulting score gives the probability in % that the endoscopic third ventriculostomy performed will still be successful after 6 months. For example, an ETVSS of 80 points means that after 6 months there is an 80% chance that the endoscopic third ventriculostomy will be successful[^2].

Figure