Fig. 1

A 21-year-old male patient developed acute right groin swelling after right femoral ECMO decannulation. Groin US revealed a large swelling (7 × 5 cm) with heterogenous echogenicity in the right groin area arising from right femoral artery with the neck measuring 0.6 cm (a). CT angiography revealed the large pseudo-aneurysm (12 × 6 cm) from the right common femoral artery with active contrast extravasation (b). Multiplanar reconstruction and advanced 3-D postprocessing were performed and revealed the large pseudo-aneurysm with good distal arterial flow (c, d). Vascular surgery was done with evacuation of the pseudo-aneurysm and repair of the femoral artery