Newborn infant with a<unk>  visible on right side of the neck A baby with a prenatally diagnosed<unk>  should be delivered in a major medical center equipped to deal with neonatal complications, such as a neonatal intensive care unit. An obstetrician usually decides the method of delivery. If the<unk>  is large, a cesarean section may be performed. After birth, infants with a persistent<unk>  must be monitored for airway obstruction. A thin needle may be used to reduce the volume of the<unk>  to prevent facial deformities and airway obstruction. Close observation of the baby by a neonatologist after birth is recommended. If resolution of the<unk>  does not occur before birth, a pediatric surgeon should be consulted.<unk> s that develop in the third trimester, after 30 weeks' gestation, or in the postnatal period are usually not associated with chromosome abnormalities. A chance exists of recurrence after surgical removal of the<unk> . The chance depends on the extent of the<unk>  and whether its wall was completely removed. Treatments for removal of<unk>  are surgery or sclerosing agents, which include: * Bleomycin * Doxycycline * Ethanol (pure) * Picibanil (OK-432) * Sodium tetradecyl sulfate
Cystic hygroma
Subdural hygroma
Encephalocele
Arachnoid cyst
Choroid plexus cyst
Porencephaly
Craniopharyngioma
Choroid plexus papilloma