Atypical presentation of symptomatic type III popliteal artery entrapment syndrome with resultant popliteal artery pseudoaneurysm formation

Popliteal artery entrapment syndrome can cause lower extremity claudication, paresthesia, and pain. This case describes a 68-year-old man presenting with a large popliteal artery pseudoaneurysm secondary to type III popliteal artery entrapment syndrome, resulting in pain, reduced knee flexion, and lower leg paresthesia. He underwent open surgical debulking of the pseudoaneurysm sac and popliteal artery repair via a reversed great saphenous vein interposition bypass. Postoperatively, he had triphasic pedal arterial signals with improvement of his pain, paresthesia, and ambulation. This case represents a rare presentation of an uncommon condition, highlighting the importance of surgical intervention once the condition is diagnosed correctly.