TABLE 1.

MOMS criteria for the presence of hydrocephalus indicating need for shunt

Criterion 1 At least 2 of the following:	An increase in the greatest occipital-frontal circumference adjusted for gestational age defined as crossing percentiles (if a plateau was reached this did not qualify)
	Bulging fontanelle or split sutures or sunsetting sign
	Increasing hydrocephalus on consecutive imaging studies determined by increase in ratio of biventricular diameter to biparietal diameter according to the method of O’Hayon et al.34
	Head circumference > 95 percentile for gestational age; or
Criterion 2	Presence of marked syringomyelia with ventriculomegaly; or
Criterion 3	Ventriculomegaly with symptoms of Chiari malformation (stridor, swallowing difficulties, apnea, bradycardia); or
Criterion 4	Persistent CSF leakage from the myelomeningocele wound or bulging at the repair site

From The New England Journal of Medicine, Adzick NS, Thom EA, Spong CY, et al. A randomized trial of prenatal versus postnatal repair of myelomeningocele, Volume 364, pp 993-1004. © 2011 Massachusetts Medical Society. Reprinted with permission from Massachusetts Medical Society.