There were many reports of infected pseudoaneurysms of the forearm that are caused by arterial injury or cannulation. However, spontaneous pseudoaneurysm of forearm artery without any history of arterial injury or cannulation is rare. Here, we report the case of an infected pseudoaneurysm in the forearm after infective endocarditis, without arterial injury or cannulation. A 76-year old man had a large, growing, pulsatile mass of the radial artery after experiencing infective endocarditis. We

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... formed an interposition with great saphenous vein graft after removing the aneurysm. This presented case emphasizes the importance of considering pseudoaneurysms in the differential diagnosis and treatment of pain in the extremity and swelling after infective endocarditis.