What are the recommended management options for a left lower‑lobe pulmonary sequestration supplied by the thoracic aorta identified on CT of the thorax?

Surgical Resection is the Definitive Treatment for Pulmonary Sequestration

For a left lower lobe pulmonary sequestration with systemic arterial supply from the thoracic aorta, surgical resection (typically lobectomy) is the recommended management, as it is curative and prevents life-threatening complications including hemorrhage, recurrent infections, and necrotizing pneumonia.

Why Surgery is Necessary

Pulmonary sequestration is not a benign incidental finding that can be observed. The aberrant systemic arterial supply creates significant risks:

• Hemorrhagic complications: The aberrant vessel can rupture, causing life-threatening hemothorax and hemoptysis requiring emergency thoracotomy 1
• Recurrent infections: The non-functioning lung tissue without bronchial communication becomes a nidus for repeated pulmonary infections 2, 3, 4
• Progressive complications: Untreated sequestrations can develop necrotizing pneumonia, sepsis, and feeding artery aneurysms that enlarge over time 4, 5

Recommended Surgical Approach

A hybrid minimally invasive strategy is now the preferred approach:

Two-Stage Hybrid Procedure:

1. Preoperative embolization or TEVAR of the aberrant systemic artery on the morning of surgery 2, 6

   • Reduces intraoperative bleeding risk from the delicate aberrant vessel
   • Allows safer minimally invasive resection

2. Same-day or staged VATS lobectomy (left lower lobectomy in this case) 2, 6

   • Video-assisted thoracoscopic approach when feasible
   • Open thoracotomy reserved for large vessels or complex anatomy

Key Technical Points:

• CT angiography should be performed preoperatively to map the aberrant vessel origin, course, and venous drainage 3, 4
• The feeding vessel typically requires stapler ligation (Endo GIA) or surgical ligation during resection 5, 6
• If the aberrant artery is very large (>5mm), consider TEVAR first to exclude it before attempting VATS 2

Timing Considerations

If there is active infection present (as suggested by "partially visualized" which may indicate inflammatory changes):

• Treat with broad-spectrum antibiotics first
• Delay definitive resection until inflammation resolves to reduce operative risk 4
• Typically wait 4-6 weeks after infection control

If asymptomatic or minimally symptomatic:

• Proceed with elective surgical planning without delay
• Do not adopt a "watch and wait" approach, as complications can be sudden and life-threatening 1

Critical Pitfalls to Avoid

• Do not observe: Unlike pulmonary nodules where surveillance may be appropriate 7, 8, sequestrations require definitive treatment regardless of symptoms
• Do not attempt resection without vascular mapping: Failure to identify and control the aberrant vessel can lead to catastrophic intraoperative hemorrhage
• Do not dismiss in young adults: While congenital, sequestrations can remain asymptomatic until adulthood and present with severe complications 4, 1

Multidisciplinary Planning Required

Coordinate between:

• Interventional radiology (for preoperative embolization/TEVAR)
• Thoracic surgery (for resection planning)
• Consider infectious disease if active infection present

The evidence strongly supports that surgical resection is curative with excellent outcomes when properly planned 2, 3, 6, while observation risks life-threatening hemorrhagic or infectious complications 4, 1, 5.