A 61 year-old man was referred to our radiology departmant for abdominal multi dedector computed tomography (MDCT) evaluation because of undefined abdominal discomfort. Patients’s medical history was unremarkable. Contrast enhanced MDCT scans revealed a round mass of 5 cm axis in the mesentary fat plans, close to inferior portion of the gastric antrum including cresent shaped hypodens area and 2 × 3 cm sized hyperdense area (Fig. A). MIP and curved MPR scans revealed that, the mass is a true sacculary aneurysm at the midportion of the right gastro epiploic artery (Fig. B, C). The aneursym with true lumen of 2 × 3 cm size, includes crescent shaped thrombus formation.