Mycotic aneurysm of the ulnar artery.

CONTEXT: Mycotic aneurysm of the ulnar artery is extremely rare. We report a case of mycotic aneurysm of the ulnar artery due to subacute bacterial endocarditis (SBE) presenting with a painful pulsatile mass in hypotenar region. CASE REPORT: In a 39-year-old man, treated as a case of SBE, a painful progressive pulsatile mass appeared in the left hypotenar region. Ultrasonography and angiography showed an aneurysm of ulnar artery in this region. The aneurysm was resected by surgery. CONCLUSION: Since the diagnosis may be difficult at the early phase and in some cases limb loss may occur, there should be high clinical suspicion to make a prompt diagnosis.