PMC10149908_01
Initial computed tomography angiography (CTA) of the first case. (A) Three-dimensional reconstruction image revealed a persistent sciatic artery (PSA) arising from the right internal iliac artery and two distal thromboembolic occlusions located at the distal PSA in the thigh and the popliteal artery at the trifurcation (arrows). A collateral arterial flow was detected between the two thromboembolic occlusions (arrowhead). (B) Axial CTA imaging revealed a PSA aneurysm 20 mm in diameter with a mural thrombus near the posterior part of the greater trochanter of the femur.
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F1
Computed tomography angiography (CTA) revealed a PSA arising from the right IIA connecting to the above-knee popliteal artery (PA) and a hypoplastic superficial femoral artery (SFA) that was discontinued to the PA (Figure 1A). Additionally, the PSA exposed an aneurysmal change 20 mm in diameter with mural thrombus at the posterior aspect of the greater trochanter of the femur (Figure 1B) alongside two distal thromboembolic occlusions.
Follow-up computed tomography angiography (CTA) images of the first case. (A) Following the operation, a three-dimensional reconstruction image 1 month after the operation demonstrated a well patent distal popliteal artery (arrow) and preserved flow from the collaterals from the deep femoral artery (arrowhead). (B) CTA 3 years after the operation revealed the complete occlusion of the persistent sciatic artery from the buttock (arrow). (C) Posterior view of the CTA 3 years after the operation demonstrated well patent collaterals from the deep femoral artery (arrow) and patent operation site (arrowhead).
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F2
The CTA after 1 month of the operation revealed well patent PA supplied by the collateral flow from the DFA, with the PSA remaining occluded at the distal thigh (Figure 2A). Three years after surgery, the CTA revealed the complete occlusion of PSA from the PSAA at the buttock to its connection with the PA and patent operation site (Figures 2B,C).
PMC10149908_02
Initial computed tomography angiography (CTA) of the second case. (A) Axial image of the CTA revealed an aneurysm with a diameter of 22 m and a mural thrombus of the persistent sciatic artery (PSA) (arrow) at the posterior aspect of the greater trochanter of the femur. (B) Three-dimensional reconstruction image revealed a collateral flow (arrows) to the calf and foot from the incomplete superficial femoral artery and occluded distal popliteal artery connected with the PSA.
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F3
The CTA showed a PSA connected to the proximal PA and a 22-mm-sized PSAA with mural thrombus at the posterior aspect of the greater trochanter (Figure 3A). The SFA was incomplete without direct connection to the PA; however, collaterals from the incomplete SFA to the posterior tibial artery (PTA) were identified (Figure 3B).