Nodular regenerative hyperplasia of the liver. Report of three cases and review of the literature.

Nodular regenerative hyperplasia of the liver is characterized grossly by diffusely nodular liver resembling micronodular cirrhosis. Viewed microscopically, the nodules consist of regenerative parenchyma without fibrosis, which are usually smaller than the hepatic lobule. Nodular regenerative hyperplasia is distinct from other nodular lesions of the liver such as cirrhosis, partial nodular transformation, focal nodular hyperplasia, and adenoma. Although nodular regenerative hyperplasia is seldom reported, it may occur more frequently than it is recognized.