What is a characteristic of a hepatic adenoma?

A hepatic adenoma is a benign liver tumor that is often associated with certain characteristic features on imaging studies. The presence of a central scar is one of the key distinguishing characteristics of a hepatic adenoma, particularly in cases of hepatic adenoma that are subtypes associated with steroid use. This central scar can be visualized on imaging studies such as ultrasound, CT, or MRI, and is particularly prominent in focal nodular hyperplasia (FNH) but can also occur in hepatic adenomas, especially those that are larger or have undergone certain changes.

Understanding why the presence of a central scar is significant can help differentiate hepatic adenomas from other liver lesions. It is crucial for radiologists and sonographers to recognize this characteristic, as it aids in making accurate diagnoses.

Other characteristics of hepatic adenomas contribute to their benign nature, including their rare association with symptoms, but they do not directly provide the same level of specificity for diagnosis compared to the presence of a central scar. While hepatic adenomas can have various associations, particularly with hormonal influences, they are not primarily caused by viral hepatitis, and they definitely are not always malignant, as most remain benign.