British spelling: describing tissue, especially lung tissue, that has become liver-like in appearance and texture due to disease.
Past tense/participle of hepatise (British spelling). When used as an adjective, it describes the resulting condition of tissue that has undergone the transformation process.
A 'hepatised lung' during pneumonia is a historic medical observation—doctors noticed the dark, solid appearance of severely infected lungs and compared them to liver tissue, creating a vivid and somewhat disturbing image of how disease transforms living tissue.
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