A 13-year-old boy presenting with digital and lip cyanosis, easy fatigability, and weight gain was diagnosed to have an intrapulmonary arterio-venous fistula. During his routine follow-up examinations, there was fullness on right upper quadrant of his abdomen. Abdominal ultrasonography (USG) showed a mass in portal hilus. We planned abdominal computed (CT) to gain tomography detailed information about the mass. Surprisingly abdominal CT and the color-Doppler sonography showed that the structure mimicking a mass was patent ductus venosus (PDV).