From the Research
The correct answer is (c) extralobar sequestration is supplied by the aorta. Pulmonary sequestration is a congenital malformation where a segment of lung tissue is separated from the normal bronchopulmonary tree and receives its blood supply from systemic circulation rather than pulmonary circulation. There are two types: intralobar and extralobar. Pulmonary sequestration more commonly occurs on the left side, not the right. Intralobar sequestration is contained within normal lung tissue, receives its blood supply from the systemic circulation (usually the thoracic or abdominal aorta), and typically drains into pulmonary veins. Extralobar sequestration exists outside the normal lung with its own pleural covering, also receives blood supply from the systemic circulation (aorta or its branches), but drains into systemic veins rather than pulmonary veins. Therefore, option (c) is correct as extralobar sequestration does indeed receive its arterial supply from the aorta or its branches, as supported by the most recent study 1.
Some key points to consider:
- The location and size of pulmonary sequestrations can vary, with some studies suggesting differences based on the origin of the feeding vessel 2.
- The diagnosis of pulmonary sequestration can be made using various imaging modalities, including ultrasonography, enhanced computed tomography (CT), and/or magnetic resonance imaging (MRI) 1.
- Surgical resection is the treatment of choice for pulmonary sequestration, with minimally invasive video-assisted thoracic surgery being a viable option 1.
- The infection rate in children with intralobar sequestration is higher than in those with extralobar sequestration 1.
Overall, the management of pulmonary sequestration should prioritize accurate diagnosis and timely surgical intervention to prevent complications and improve outcomes, as emphasized in the most recent and highest quality study 1.