PMC9732263_01
Preoperative ultrasonography. The spectral pattern was changed and triphasic waves were absent.
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F1
Ultrasound showed reduced flow velocity in the right lower limb artery, superficial femoral artery (34 cm/s), popliteal artery (24 cm/s), anterior tibial artery (20 cm/s), posterior tibial artery (17 cm/s), and peroneal artery (24 cm/s), with absent triphasic waves (Figure 1).
Preoperative CTA and MRI. (A-C) CTA showed severe stenosis of the popliteal artery in the right lower extremity. (D-G) MRI suggested that the popliteal artery was compressed by an oval cyst with high signal intensity on T2-weighted, which is 1.7*2.5*3.1 cm in volume.
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F2
CTA suggests severe stenosis and almost complete occlusion of the P1 segment of the popliteal artery (Figures 2A-C). MRI suggested that the popliteal artery was compressed by an oval cyst with high signal intensity on T2-weighted, which is 1.7*2.5*3.1 cm in volume (Figures 2D-G).
(A) The popliteal artery was connected to a tendon sheath cyst on the medial aspect of the long distal head of the biceps femoris tendon with a smooth, tough wall, and jelly-like contents. (B,C) After cyst removal, blood flow of popliteal artery and triphasic waves were restored.
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F3
The popliteal artery was connected to a tendon sheath cyst on the medial aspect of the long distal head of the biceps femoris tendon with a smooth, tough wall, and jelly-like contents (Figure 3A). After cyst removal, blood flow of popliteal artery and triphasic waves were restored (Figures 3B,C).
Postoperative pathology suggests a fibrous cyst wall. (A) The wall of the cyst. (B) The contents of the cyst.
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F4
Postoperative pathology suggests a ganglion cyst (Figure 4).