Thrombosis in unusual sites of the lower extremity veins

Anterior right thigh view (left panel) showing the inguinal ligament (A), common femoral vein (B), deep femoral vein (C), and the profunda-popliteal vein (D). N depicts the number of cases identified involving deep vein thrombosis of the latter vein segment. The right panel shows a posterior view of the right hip and thigh, with the sciatic nerve (A) and a persistent sciatic vein (B). Two cases of deep vein thrombosis of the persistent sciatic vein segment were recorded.

Lateral right thigh view (left panel) showing the lateral marginal thigh vein (A), the biceps femoris muscle (B), sciatic nerve (C), and a muscular thigh vein (D), where one case of deep vein thrombosis was seen. Two cases of thrombosis affecting the lateral marginal thigh vein were diagnosed. The right panel shows an anterior view of the right hip and thigh, with the deep external pudendal vein (A), the deep femoral vein (B), femoral vein (C), knee (D), inguinal ligament (E), and the saphenofemoral junction (F). One case of deep vein thrombosis of the deep external pudendal vein was seen and eight affecting the deep femoral vein. Both cases of deep external pudendal vein were associated with thrombosis of an additional unusual segment, one involving the muscular vein depicted on the left panel and the other affecting the deep external pudendal vein showed on the right.