Cardiovascular · UKMLA & AKT
Popliteal aneurysm
A free high-yield preview for the UKMLA Applied Knowledge Test, covering how to recognise this condition. The full SA Note notes add investigations, management and complications, with practice questions on this topic.
Key high-yield points
- Most common peripheral aneurysm - ~70% of all peripheral arterial aneurysms
- Predominantly older men; bilateral in ~50% of cases
- Co-existing AAA in 30-40% - always image the aorta on diagnosis
- Aneurysmal when diameter >1.5-2.0 cm (>50% dilatation of normal vessel ~1.0-1.1 cm)
Popliteal aneurysms thrombose; aortic aneurysms rupture. Turbulent flow → mural thrombus → acute thrombosis or distal embolisation → limb loss.
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