Ruptured deep femoral artery aneurysm simulating a soft-tissue sarcoma: a case report

False aneurysms of the deep femoral artery are uncommon. The presentation in the 80-year-old woman described in this case report was unique in that the pseudoaneurysm was subacute; after an initial hemorrhage, compression of the pseudoaneurysm by the deep femoral artery resulted in a large hematoma suggestive of a soft-tissue sarcoma. The recommended management was angiography, computed tomography and magnetic resonance imaging to differentiate between a false aneurysm and a tumour followed by treatment for the vascular lesion. Such an approach will prevent tumour spread and uncontrollable hemorrhage.