False aneurysms of the deep femoral artery are uncommon. The presentat
ion 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 recommend
ed management was angiography, computed tomography and magnetic resona
nce imaging to differentiate between a false aneurysm and a tumour fol
lowed by treatment for the vascular lesion. Such an approach will prev
ent tumour spread and uncontrollable hemorrhage.