Atoll sign (liver MRI)

The atoll sign in hepatic imaging has been described when a liver lesion shows a peripheral rim of high T2 signal intensity with the center of the lesion appearing isointense to the background of non-cirrhotic liver on T2WI mimicking an atoll. It is considered a characteristic sign of an inflammatory hepatic adenoma but is only seen in about one-third of cases. It probably represents dilated sinusoids within the periphery of the adenoma.

See also

Article information

rID: 39503
Section: Signs
Synonyms or Alternate Spellings:
  • Atoll sign - liver imaging

ADVERTISEMENT: Supporters see fewer/no ads

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.