Table 1.

Kulkarni's ETV success core [11].

Calculation of the ETVSS∗
Score	Age	Etiology	Previous Shunt
0	<1 mo	Postinfectious	Previous shunt
10	1 mo to <6 mos		No previous shunt
20		Myelomeningocele, IVH, nontectal brain tumor
30	6 mos to <1 yr	Aqueductal stenosis, tectal tumor, other
40	1 yr to <10 yrs
50	≥10 yrs

^∗The ETVSS is calculated as age score + etiology score + previous shunt score. IVH = intraventricular hemorrhage.