“…4,9,11,13,14 On US, hematomas exhibit variable echogenicity and internal complex echotexture but almost never demonstrate internal blood flow. 8 Typical color Doppler US findings of a pseudoaneurysm include a focal area of flow with a mixed swirling of red and blue colors changing from systole to diastole, and a jet between the vessel and the aneurysmal sac. [3][4][5]8,9,11 On spectral Doppler analysis a ''to and fro'' sign is characteristic of a pseudoaneurysm.…”