Hepatocellular Adenoma, Liver, Rat
Hepatocellular adenomas vary in size and multiplicity. Most are nonfatal and are discovered incidentally when animals are killed or die for other reasons. If a liver tumor is located close to the ventral body wall, it may be detectable by palpation in a nonobese animal. However, this is not a reliable way to detect liver tumors in living animals. Moreover, since heavy palpation may cause a tumor to bleed, this method of detecting liver tumors in living animals is not recommended. If an adenoma arises near the liver surface, it may be noticed at necropsy even if it has a mean diameter of less than 1 mm. Otherwise the presence of small adenomas may not be suspected until tissues are trimmed after fixation or until sections are examined under a microscope. Even the presence of a very large tumor that replaces a whole lobe of the liver may not be suspected until necropsy unless it gives rise to abdominal distension.
SynonymsBenign liver cell tumor liver parenchymal cell adenoma hepatoma neoplastic nodule
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