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Fig. 3 —20-year-old woman with primary lymphedema (not same patient as in Fig. 2). Angled 3D spoiled gradient-echo high-resolution MR lymphangiography sequence, obtained 55 minutes after contrast material injection, clearly delineates dilated lymphatic external iliac pathway (arrowhead), originating from inguinal lymph nodes, indicating obstruction. Furthermore, dermal backflow (arrows) is detected. Note enhancement of bladder (asterisk), showing venous uptake and renal clearance of contrast medium after intracutaneous injection.