What is the typical proximal-to-distal drainage sequence for a leg?

• A. Drain inguinal/iliac regions first, then drain the thigh, knee, calf, ankle, and foot.
• B. Drain foot first, then ankle, calf, thigh, knee, inguinal.
• C. Drain from foot to thigh.
• D. Drain the knee first.

Answer: (A)

The main idea being tested is how lymphatic drainage should be guided along a limb: you work toward the central, proximal drainage points first, then move outward to the distal parts. For the leg, that means starting at the inguinal/iliac regions to open the main proximal pathways toward the trunk, then proceeding sequentially down the thigh, knee, calf, ankle, and finally the foot. This proximal-first approach helps create a clear route for lymph to travel toward the trunk (thoracic duct) and reduces backpressure in the limb, making distal drainage more effective as you move outward. If you start with the foot or any distal part without first establishing the proximal pathways, lymph has fewer ready routes to reach, which can lessen efficacy and promote pooling. So the recommended order—proximal regions first, then successively more distal segments—best aligns with how to efficiently direct lymph toward central drainage.