Intralobar pulmonary sequestration displayed as localized emphysema on computed tomography image

BACKGROUND Pulmonary sequestration is a relatively rare condition in which a systemic artery supplies blood to an abnormal lung tissue and the normal connection with the bronchial tree is absent. It can be displayed as various signs on the computed tomography image, but emphysema is extremely rare. CASE PRESENTATION We describe the case of a 35-year-old man with intralobar pulmonary sequestration that appeared as localized emphysema on the computed tomography image. The 3-D reconstruction revealed the presence of an anomalous feeding artery and the absence of normal connection with the bronchial tree. CONCLUSION We presumed that it was a type between "anomalous systemic arterial supply to the normal lung" and the common type of pulmonary sequestration. Common pulmonary lobectomy was performed and the patient recovered well.