Prevalence:

• 1 in 50,000 births.

Ultrasound diagnosis:

• Single cyst in a central position with no signs of compression and no associated altered echogenicity of the adjacent lung.

Associated abnormalities:

• The incidence of chromosomal abnormalities and genetic syndromes is not increased.

Investigations:

• Detailed ultrasound examination.

Follow up:

• Ultrasound scans every 4 weeks to monitor the evolution of the lesion.

Delivery:

• Place: hospital with neonatal intensive care and pediatric surgery.
• Time: 38 weeks.
• Method: if there is evidence of bronchial obstruction delivery should be by cesarean section with EXIT procedure.

Prognosis:

• The cysts are usulally asymptomatic except in cases of tracheobronichal obstruction.

Recurrence:

• No increased risk of recurrence.