Left pulmonary artery sling: difference in monochorionic monoamniotic twin presentation.

Area of Science:

• Cardiology
• Pediatric Surgery
• Thoracic Surgery

Background:

• Pulmonary artery sling (PAS) is a rare congenital vascular anomaly.
• Literature on PAS in twins is limited, making diagnosis and management challenging.
• Understanding PAS variations is crucial for timely intervention in affected infants.

Observation:

• This report details two distinct presentations of PAS in monoamniotic-conjoined twins.
• Twin A exhibited airway narrowing without direct compression, a common PAS presentation.
• Twin B demonstrated direct airway compression due to the anomalous left pulmonary artery (LPA).

Findings:

• PAS can lead to significant respiratory distress, including wheezing, stridor, atelectasis, or emphysema.
• While LPA slings typically don't encircle the airway, they can cause severe illness via adjacent airway narrowing.
• Outcomes in monoamniotic twins with PAS can be highly variable, necessitating careful monitoring.

Implications:

• Early diagnosis of PAS in twins requires high clinical suspicion.
• Variability in PAS presentation underscores the need for tailored diagnostic and management strategies.
• Monitoring respiratory compromise is essential for improving outcomes in infants with PAS.