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Magnetic resonance imaging. A: Magnetic resonance imaging shows a target-like sign as a gradual peripheral ring-like enhancement pattern with central low signal intensity in the arterial to delay phases, and the enhanced lesion is surrounded by a thin, hypointense ring on contrasted-enhanced T1-weighted image; B: The lollipop sign consists of a clear tumor mass (candy in the lollipop) and adjacent occluded vein (rod).
