Correct!
3. Intralobar sequestrations typically drain into the systemic venous circulation to the right atrium, whereas extralobar sequestrations typically drain into the pulmonary venous circulation to the left atrium
Pulmonary sequestration is non-functioning lung tissue, deriving its blood supply from systemic arteries, not in continuity with the tracheobronchial tree. Pulmonary sequestrations are classified as intralobar and extralobar. Intralobar pulmonary sequestrations account for the majority of sequestrations. Intralobar sequestrations are contained within the same visceral pleural lining that covers the normal adjacent lung, unlike extralobar sequestrations, which are contained within their own visceral pleural envelope. Intralobar sequestrations are typically located in the lower lobes, more commonly the left side. Both intralobar and extralobar sequestrations derive their blood supply from the thoracoabdominal aorta, but intralobar sequestrations are typically drained by the pulmonary venous system to the left atrium, whereas extralobar sequestrations commonly drain via the systemic venous circulation. Intralobar sequestrations most commonly present in young adults with a history of recurrent pneumonia, chronic cough, and / or sputum production, whereas extralobar sequestrations are often associated with other congenital anomalies are often detected during the course of evaluation for such anomalies.
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