Table 2.

TASC II Classification of Femoral-Popliteal Lesions

Classification	Lesion(s)	Recommendation
Adapted from TASC II document. J Vasc Surg 2007;45:S5–S67. CFA, common femoral artery; SFA, superficial femoral artery.
Type A lesions	Single stenosis ≤10 cm in length	Endovascular therapy is the treatment of choice for TASC A lesions
	Single occlusion ≤5 cm in length
Type B lesions	Multiple lesions (stenoses or occlusions), each ≤5 cm	Endovascular therapy is the preferred treatment for type B lesions; the patient's comorbidities, fully informed patient preference, and the local operator's long-term success rates must be considered when making treatment recommendations for type B and type C lesions
	Single stenosis or occlusion ≤15 cm not involving the infrageniculate popliteal artery
	Single or multiple lesions in the absence of continuous tibial vessels to improve inflow for a distal bypass
	Heavily calcified occlusion ≤5 cm in length
	Single popliteal stenosis
Type C lesions	Multiple stenoses or occlusions totaling ≥15 cm with or without heavy calcification	Surgery is the preferred treatment for good-risk patients with type C lesions; the patient's comorbidities, fully informed patient preference, and the local operator's long-term success rates must be considered when making treatment recommendations for type B and type C lesions
	Recurrent stenoses or occlusions that need treatment after two endovascular interventions
Type D lesions	Chronic total occlusions of the CFA or SFA >20 cm involving the popliteal artery	Surgery is the treatment of choice for TASC D lesions
	Chronic total occlusion of the popliteal artery and proximal trifurcation vessels