Radiograph of embedded sea urchin spine in foot

Reproduced with permission from: Isbister GK. Trauma and envenomations from marine fauna. In: Tintinalli's Emergency Medicine: A Comprehensive Study Guide, 7^th ed, Tintinalli JE, Stapczynski JS, Ma OJ, Cline DM, Cydulka RK, Meckler GD (Eds), McGraw-Hill 2010.