Which benign liver mass is the second most common after hemangioma and is noted for having a central scar?

Focal Nodular Hyperplasia (FNP) is indeed the second most common type of benign liver mass after hemangioma. It is characterized by the presence of a central scar, which is a distinguishing feature that sets it apart from other liver lesions. FNP is composed of hepatic tissues including bile ducts, arteries, and fibrous tissue, arranged in a distinctive pattern. This central scar can often be identified through imaging studies, such as ultrasound or MRI, and is critical for its diagnosis. Understanding this characteristic is key for differential diagnosis when evaluating liver masses.

In contrast to FNP, other options do not have a central scar or similar characteristics. Cirrhosis is a chronic liver disease marked by fibrosis and architectural distortion, not typically presenting as a focal mass. Hepatic lipomas are rare benign tumors of adipose tissue that would not form a central scar and are less common. Liver cell adenomas are also benign tumors but are associated with certain risk factors and do not exhibit a central scar either. Thus, identifying Focal Nodular Hyperplasia as the benign liver mass with these specific characteristics is crucial for correct assessment in clinical practice.