9.7 Focal nodular hyperplasia (FNH) 

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Presents as an incidental finding in the liver.

This is a local hyperplasia in response to a defect in a large arterial blood vessel. The lesion is usually solitary. The diagnosis is made by the typical characteristics on a CT or MRI scan, for example the central star-shaped structure. FNH does not cause any complaints and is not complicated. Consequently, there is no indication for resection.

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