[Anormalous Systemic Arterial Supply to the Basal Segments of the Lung Presented with Chest Back Pain;Report of a Case].

A 58-year-old woman visited our hospital due to left chest back pain. Chest computed tomography (CT) showed 19 mm nodule in the left lower lobe with the abnormal artery supply from the descending aorta and it was diagnosed as the anomalous systemic arterial supply to the basal segments of the lung. She had undergone partial resection of the left lower lobe by video-assisted thoracoscopic surgery. Histopathology showed the inflammatory change with fibrosis and lymphocites in the nodule, and fungus-like bacterial masses with macrophages and neutrophils. At 7 days after the operation, the patient discharged without any problems. In order to perform less invasive treatment, early surgical intervention should be considered to prevent the spread of inflammation in the thoracic cavity.