Professional and Linguistic Assessments Board (PLAB) Practice Exam

Which veins are associated with dilation on the lateral leg?

1. Great saphenous

2. Short saphenous

3. Femoral

4. Popliteal

The correct answer is: Short saphenous

The short saphenous vein is primarily associated with dilation on the lateral leg. This vein runs along the posterior aspect of the leg, starting from the lateral foot and extending up towards the popliteal vein behind the knee. When considering vascular conditions such as varicose veins or venous insufficiency, it is the short saphenous vein that often experiences dilation due to increased pressure from standing or walking, particularly in cases where the valve function is compromised. This vessel plays a crucial role in venous return from the lower extremities, and its proximity to the superficial tissues makes it more susceptible to changes in pressure and dilation. The other veins listed do not primarily serve the lateral aspect of the leg or are located deeper within the limb’s anatomy, making them less relevant to this question. For instance, the great saphenous vein runs along the medial side of the leg, while the femoral and popliteal veins are located centrally and posteriorly, respectively.