PMC4921181_01
(A) Digital subtraction angiography (DSA) of the left popliteal artery shows significant vascularity of the left lateral knee via the left superior lateral geniculate and left inferior lateral geniculate arteries (upper and lower arrows, respectively). (B) Arterial delayed-phase image shows significant staining of the left lateral synovium.
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Diagnostic arteriography showed synovial hypervascularity of the left lateral knee (Fig. 1).
(A) DSA of the left superior lateral geniculate artery before embolization. (B) Postembolization angiography shows devascularization of the synovium.
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Embolization was performed using 300-500-microm-sized Embosphere Microspheres (Biosphere Medical Systems Inc., South Jordan, UT) (Fig. 2, Fig. 3).
Final DSA of the left popliteal artery shows dramatic reduction in left lateral synovial vascularity, with significantly decreased flow in the left superior lateral geniculate artery. The left inferior lateral geniculate artery is no longer visualized.
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Postembolization arteriography showed significant decrease in the vascular supply to the left lateral knee, with no significant synovial staining (Fig. 4).