Contrast-Enhanced US of Focal Nodular Hyperplasia: A Leave-Alone Lesion

Focal nodular hyperplasia (FNH) is a benign liver tumor with no malignant potential, requiring no surgery—a true 'leave alone' lesion. CEUS aids diagnosis. Most common in women aged 20-50, with an 8:1 female-to-male ratio, and no link to oral contraceptives.

• Educational radiology lecture reviewing grayscale and contrast-enhanced ultrasound features of FNH.
• FNH is the second most common benign liver tumor after hemangioma; etiology is regenerative/hyperplastic, not neoplastic.
• Key differentiator: unlike hepatic adenoma, FNH has no association with oral contraceptives.

Automated summary

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