Incidentalomes

US is useful to determine the number of lesions (single versus multiple) and the cystic or solid nature of each lesion. Cystic lesions are usually benign. Incidental solid liver lesions are typically benign, but detection of a malignant lesion, hepatocellular carcinoma and metastases, is possible. The most frequent benign incidental solid liver lesions are hemangioma, focal nodular hyperplasia and liver cell adenoma. Accurate imaging diagnosis may not always be achievable, and biopsy, percutaneous or surgical, may be required.