Focal Nodular Hyperplasia
- Focal Nodular Hyperplasia does not appear to be a neoplasm at all but rather a hepatocytic hyperplastic response to a deranged blood supply. It is thought that scarring obliteration of portal vein branches results in proliferation of hepatic artery branches. This may increase the local blood supply, inciting hyperplasia of hepatocytes. Noteworthy as far as morphology is a central scar within the circumscribed mass of hyperplastic hepatocytes.