Pulmonary sequestration is an uncommon congenital malformation where non-functioning lung tissue is separated from the normal bronchopulmonary tree and vascularized by an aberrant systemic artery. We describe a previously healthy 17 year old girl who was diagnosed with intralobar sequestration following a pneumonia and pulmonary abscess. The diagnosis was made with on CT-scan and confirmed by MRI angiography. A right lower lobectomy was performed and six months later the patient was without symptoms. The case is discussed and the literature reviewed.