What is a 'lower gastrointestinal series'?

What is a 'lower gastrointestinal series'?

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A lower gastrointestinal series is basically a barium enema where you put a radio-opaque dye in the rectum. It moves through the colon, so it gives you a view of what the colon looks like. You're essentially determining if there is any anatomical or structural abnormalities of the colon.