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Tests and procedures used to diagnose nonalcoholic fatty liver disease include:
Liver tissue testing. If it's suspected that you have a more serious form of nonalcoholic fatty liver disease, your doctor may recommend a procedure to remove a sample of tissue from your liver (liver biopsy). The tissue sample is examined in a laboratory to look for signs of inflammation and scarring.
Liver biopsy is typically done using a long needle inserted through your skin and into your liver to remove liver cells (needle biopsy).
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