Figure 1From: Pulmonary focal fibrosis associated with microscopic arterio-venous fistula manifesting as focal ground-glass opacity on thin-section CT Chest thin-section CT on admission to our hospital. (a) A thin-section CT at the level of right upper lobe shows a 10-mm round, well-defined GGO nodule (arrow). There are slightly dilated veins or thickening of the interlobular septa (arrow heads). (b) Similar findings are seen also on the slice just above the focal GGO (arrow heads).Back to article page