To shunt or not to shunt a pulmonary adenomatoid cystic malformation after 33 weeks of gestation: a case report.

Context: Macrocystic adenomatoid malformation of the lung can cause severe mediastinal shift, hydrops and polyhydramnios, thereby increasing the risk of perinatal deaths. After 33 weeks of gestation, repeated puncturing of the cyst is recommended. We present a case in which a cyst-amniotic shunt was placed instead of performing this procedure.