Abundant hemoptysis revealing an aneurysm of an aberrant systemic artery to the left lower pulmonary lobe: A case report.

Pulmonary sequestration (PS) is a congenital anomaly characterized by a lung region that is isolated from its normal bronchial and vascular connections. It typically receives blood supply from an aberrant systemic artery. An aneurysm of that aberrant artery is extremely rare.