Which statement describes Reidel's lobe?

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Reidel's lobe is a tongue-like extension of the inferior border of the right hepatic lobe that projects downward into the lower right abdomen. It is an anatomical variant, not a separate lobe, and is often incidental on imaging. This downward, tongue-shaped projection from the right lobe is what defines Reidel's lobe. By contrast, the caudate lobe is a distinct posterior structure near the IVC, and the quadrate lobe is the part of the visceral surface between the gallbladder fossa and the porta hepatis; neither describes an inferior extension of the right lobe.