Focal hepatic steatosis

Case contributed by Dr Natalie Yang


Incidental finding on imaging.


CT demonstrates the presence of a low attenuation geographic lesion, with vessels coursing through without displacement.


Ultrasound demonstrates an ovoid, homogenously hyperechoic lesion


T1 in-phase image shows a subtle hyperintense “mass” corresponding to previous US and CT, which uniformly loses signal on the T1 opposed-phase scan. The lesion has angular margins, vessels coursing through undistorted with enhancement less than normal liver parenchyma. Subtle high signal intensity is demonstrated on the T2 non fat suppressed imaging, which loses signal with fat suppression. 

Case Discussion

Focal hepatic steatosis is often recognized by:

  • Location:  peri-ligamentous, peri-portal
  • Distribution of lesions
  • Presence of non-distorted, traversing blood vessels

Despite this, patchy focal fat deposition and relative fatty sparing may be mistaken for a focal neoplasm (particular at US and CT) and thus MR in-phase and opposed-phase imaging allows reliable differentiation

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Case information

rID: 6949
Published: 30th Aug 2009
Last edited: 16th Jul 2018
Tag: liver
Inclusion in quiz mode: Included

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