Arterial ulcers are typically located at the lateral malleolus and have which border?

• A. Medial malleolus with irregular borders
• B. Dorsum of foot with punched-out borders
• C. Lateral malleolus with smooth borders
• D. Posterior calf with serrated borders

Answer: (C)

Arterial ulcers come from reduced blood flow to the distal parts of the leg and foot. Because the tissue becomes ischemic, the resulting wound tends to have a crisp, well-demarcated edge that appears smooth. This pattern fits the lateral malleolus, a distal site where perfusion is often lowest and trauma can localize the injury. The base is typically pale or necrotic, and drainage is minimal, reflecting dry ischemic tissue.

This contrasts with venous ulcers, which usually sit around the medial malleolus and show irregular, ragged borders with more drainage due to venous hypertension and edema.