The next four slides represent a remarkable radiographic demonstration of the pathological physiology involved in production of chyluria. Bilateral lymphangiograms were obtained by injecting contrast into inter-digital lymphatics. X-rays made subsequently reveal (white) dilated tortuous lymphatic channels. Flow in the lymphatics is obstructed high in the abdomen and in the chest Backflow occurs outlining the pericalyceal lymphatics and the buttercup-like renal calyces. Subsequently, the urinary bladder Fills with contrast and becomes white. In short, obstruction to lymphatic flow causes reverse flow to the kidneys and subsequently to the bladder. Consult your local radiologist for help. He will enjoy these slides.