Figure 8a. Chyluria in an 84-year-old woman with W bancrofti filariasis. (a) Lymphogram obtained during the filling phase shows numerous collateral lymphatic vessels around the left kidney. Numerous lympholymphatic anastomoses are seen between both sides of the lymphatic system, a finding indicative of stasis. (b) Lymphogram shows that the thoracic duct is obliterated and appears tortuous and expanded. These findings are typical of filariasis. (c) CT scan obtained after lymphography shows that contrast material has flowed off into pyelocaliceal structures and shows the exact site of the leakage at the level of the left kidney. (d) Lymphogram obtained during the nodal phase at 24 hours shows contrast material in the calices of the left kidney.