Title: Popilateal Artery Entrapment

Imaging Findings:
MRI:
Angiography: 6 types.

Clinical:
Claudation-like symptoms.

Etiology:
Embryologic premature formation of popilateal artery prior to medial migration of medial head of gastrocnemius to medial femoral condyle. Progressive fibrosis of popilateal artery due to abnormal stresses with eventual stenosis.

References:
1. Levien LJ, Veller MG. Popilateal artery entrapment syndrome: more common than previously recognized. J Vasc Surg. 2000 May; 31(5):1077-8.
2. Chernoff DM, et al. Asymptomatic functional popilateal artery entrapment: demonstration at MR imaging. Radiology 1995; 195:176-180.