Cervical lung herniation of the azygous lobe: a case report and literature review.

Purpose: To report an adult case of cervical lung herniation involving the azygous lobe and to review the literature.

Methods: A trauma patient was incidentally found to have a cervical lung herniation involving the azygous lobe. We reviewed the literature on cervical lung herniation, described techniques used to diagnose and evaluate cervical lung herniations and summarized management options.

Results: Cervical lung herniation results in a defect in Sibson's fascia allowing the apical lung to protrude above the thoracic inlet. In the adult population, these are commonly seen after trauma or surgical intervention, but congenital forms have also been described in the pediatric population. Apical herniation of the lung can cause symptoms due to mass effect on the esophagus or trachea. We report an adult case of cervical lung herniation involving the azygous lobe.

Conclusion: Cervical lung herniation is a relatively rare entity compared to lung herniation through the rib cage. Knowledge of this entity is essential to properly evaluate trauma patients and to diagnose patients who have symptoms of cough, dysphagia or a bulging neck mass.