Table 1: Classification of popliteal artery branching patterns in the leg.

Class Vascular Pattern
I-A
I-B
I-C
II-A1
II-A2
II-B
II-C
III-A
III-B
III-C
III-D
Usual pattern
Trifurcation: AT, PT and PER arise below knee within 0.5 cm of each other
Anterior tibioperoneal trunk: PT is first branch, then TPT bifurcates into PER AND AT
AT arises at or above the knee joint, with normal course in its proximal segment
AT arises at or above the knee joint, with medial curve in its proximal segment
PT arises at or above the knee joint, common trunk of AT and PER
PER arises at or above the knee joint, common trunk of AT and PT
Hypoplastic or aplastic PT, distally replaced by PER
Hypoplastic or aplastic AT, DP replaced by PER
Hypoplastic or aplastic AT and PT, DP and PT replaced by PER (Arteria Peronea Magna)
Hypoplastic or aplastic PER

AT: Anterior Tibial artery, DP: Dorsalis Pedis artery, PT: Posterior Tibial artery, PER: Peroneal Artery, TPT: Tibioperoneal Trunk.