 Hello everyone. Today my topic of case presentation is a rare case of pseudoaneurysm. Myself presenting author Dr. Shree Krishna Deore, 2nd day junior resident at Dr. Panchabrao Deshmukh Memorial Medical College, Amuravati. I have prepared this case presentation under the guidance of Dr. Sandhya Kottari, head of department of radar diagnosis. A 60 year old male patient was presented with complaints of right lower limb swelling which was pea sized since one month. It grew to a massive size in the past 8 days. The swelling was hard, immobile and tender with local resident temperature. No past operative or intervention history was present. All the blood parameters of the patient were in normal range. On clinical examination malignant lesion that is soft tissue sarcoma was suspected. This is the clinical picture at here there is we can see the swelling at the proximal part of thigh. The patient was later advised USG. On ultrasonogram there was evidence of heterogeneous hyperquick lesion with slow internal flow within which was continuous with right superficial femoral artery. In this short video there is evidence of slow flow which is caused by turbulence. On colored Doppler the lesion was showing internal vascularity with bi-directional to and fro movement or characteristic in young sign. On spectral Doppler spectral widening is noted due to the turbulent flow. So ultrasonogram revealed well defined heterogeneously hyperquick lesion arising from lateral aspect of mid portion of right superficial femoral artery with presenting contents within intermingled with ecogenic beams suggestive of hematic content with presence of ecogenic thrombus at the periphery finding suggestive of pseudoneurism of superficial femoral artery. Later the patient was advised MRI. On MRI there was flow artifact which is clearly seen in this images that is T2-XL and T2-sazytel the hypo intense area between show flow artifact. On DWI and GRE sequences a peripheral rim of thrombus is noted. MRI thus revealed a large circular aneurysmal dilatation showing flow artifact with irregular margins around right mid superficial femoral artery in entero-middle compartment of mid thigh with peripheral rim of thrombus suggestive of pseudoneurism formation along right mid superficial femoral artery. Patient was further operated with vascular reconstruction surgery. Pseudoneurism is defined as abnormal bulging or dilatation of arteries which are bounded only by the tunic adventitia the outermost layer of the arterial wall. These are distinguished from two aneurysms which are bounded by all three layers of arterial wall. Pseudoneurism typically occur when there is a breach in the vessel wall such that flow leaks through the inner wall but is contained by the adventitia or surrounding perivascular soft tissue. Immediate interventions help in reducing complications like rupture of aneurysm. In this figure there we can see the difference between the true and the false aneurysm. Pseudoneurism can be due to spontaneous dissection, itrogenic that is most common in arterial catheterization, trauma or inflammatory conditions like vasculatitis, giant cell arthritis, polyarthritis nodosa and mycotic aneurysm. Complications can involve embolization, ischemia and gangrene of the leg, bleu-toe syndrome, rupture and venous compression. Treatment of femoral Pseudoneurism includes open surgical repair, ultrason-guided compression, ultrason-guided thrombin injection, coil embolization, covered strength placement. Early detection of Pseudoneurism is of utmost importance to prevent complications. These are some of my references. Thank you.