PMC4896230_01
48-year-old woman with hypothenar hammer syndrome. Frontal digital subtraction angiogram demonstrates a bilobed aneurysm overlying the ulnar artery with normal appearing distal vasculature.
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The angiogram (Figure 1A, Figure 1B, Figure 1C) demonstrated a bilobed aneurysm measuring 2 x 5 cm overlying the proximal aspect of the fourth metacarpal bone which was being fed by a single large branch of the ulnar artery.