1. Figure 12a. Right toe wound and thrombangiitis obliterans in a 45-year-old woman with a history of smoking, hypertension, and bilateral rest pain in the lower extremities. (a) Right lower extremity with ABIankle-brachial index of 1.00 and posterior tibial monophasic Doppler waveforms. (b) Angiogram shows the anterior tibial artery (AT) occluded in the distal calf and classic corkscrew collaterals extending distally (arrowhead). The aortoiliac and femoropopliteal segments were unremarkable (not shown), and the posterior tibial and peroneal arteries were occluded proximally (not shown).