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Joseph Junewick, MD FACR
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Pulmonary Artery Sling

Case Detail

Anatomy: Chest
Junewick
Joseph Junewick, MD FACR
Diagnostic Category: Developmental or Congenital
Created: over 5 years ago
Updated: over 5 years ago
Tags: PEDS
Modality/Study Types: CT
Activities:
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History

2 month old male with respiratory distress.


Case Images


Diagnosis

Pulmonary Artery Sling

Findings

CT – Left pulmonary artery arises from the right pulmonary artery and extends posterior to the left mainstem bronchus. Volume rendered 3D image shows marked hypoplasia of the trachea and mainstem bronchi.

Discussion

In pulmonary sling, the left pulmonary artery arises from the posterior aspect of the right pulmonary artery and passes between the trachea and esophagus to reach the left hilum, forming a sling around the distal trachea and the proximal right main bronchus. This anomaly is usually clinically silent unless associated with tracheobronchial anomalies (tracheal stenosis and absence of the pars membranacea) which lead to respiratory distress. Occasionally a pulmonary artery sling may mimic a mediastinal mass on chest radiographs.

Reference

Castner E, Gallardo X, Rimola J, et al. Congenital and Acquired Pulmonary Artery Anomalies in the Adult: Radiologic Overview. RadioGraphics (2006); 26: 349-371.



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