Pathophysiology of leg pain / Srdjan S. Nedeljković -- The initial encounter / Magruder C. Donaldson -- Mechanical leg pain / Tamara L. Martin and Scott D. Martin -- Inflammatory leg pain / Sang Cheol Bae and Matthew H. Liang -- Vascular leg pain / Magruder C. Donaldson -- Neuropathic leg pain / David C. Preston -- Other leg pain / Magruder C. Donaldson