On ultrasound, Reidel's lobe appears identical to what?

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Reidel's lobe is a normal inferior extension of the right hepatic lobe. On ultrasound it preserves the same echogenicity and texture as the rest of the liver and remains contiguous with the hepatic parenchyma, so it appears as normal liver tissue rather than a distinct mass, an echogenic area different from liver parenchyma, or the spleen. This normal continuity and uniform appearance is what makes it look identical to normal liver parenchyma.