fatty liver
Medical term for the accumulation of fat in liver cells. Often associated with obesity, alcohol consumption, or metabolic syndrome.
I was diagnosed with fatty liver at my health checkup.
Fatty liver often improves with lifestyle changes.
肝炎 is hepatitis (liver inflammation), which can have various causes including viruses, whereas 脂肪肝 specifically refers to fatty infiltration.
Compound of 脂肪 (shibō, 'fat') and 肝 (kan, 'liver'). A straightforward medical term.