Bronchopulmonary sequestration is a pulmonary anomaly characterized by a segment of lung tissue that lacks connection with the tracheobronchial tree and receives its blood supply from which source?

• A. Pulmonary artery
• B. Pulmonary veins
• C. Systemic circulation
• D. Coronary circulation

Answer: (C)

Bronchopulmonary sequestration is defined by a mass of lung tissue that does not connect to the tracheobronchial tree and, importantly, receives its arterial blood from systemic circulation—most often a branch of the thoracic aorta. This systemic arterial supply distinguishes it from normal lung tissue, which is fed by the pulmonary arteries. While venous drainage can vary, the key point tied to the question is the arterial source: systemic circulation. Arterial supply from the pulmonary arteries or from coronary circulation would not fit the characteristic blood supply of sequestration.