internal iliac lymph nodes

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in·ter·nal il·i·ac lymph nodes

nodes that lie along the internal iliac artery and its branches; they receive lymph from the pelvic viscera, the gluteal region, and the deep parts of the perineum, and send efferent vessels to the common iliac nodes.
Farlex Partner Medical Dictionary © Farlex 2012
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A transaxial PET scan of the same patient showed abnormally high uptake of the FDG isomer, and a fusion scan of the images superimposed on each other demonstrated high uptake in both internal iliac lymph nodes, as well as in the sigmoid colon.