Focal Fatty Sparing

📄 SCRS

Hepatic
Focal Fatty Sparing

Hepatic Focal Fatty Sparing ultrasound case study

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Reporting Panel

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Liver Pathology

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USG

Hepatic Focal Fatty Sparing ultrasound case study

CASE–1

Clinical History

Patient was referred for abdominal ultrasound due to suspected fatty liver or an incidentally detected focal hypoechoic hepatic lesion on previous imaging. There is no known history of chronic liver disease or hepatic malignancy.

Ultrasound Findings

Ultrasound examination demonstrates a well-defined focal hypoechoic area within a diffusely echogenic fatty liver, commonly located adjacent to the gallbladder fossa, falciform ligament, porta hepatis, or subcapsular region. The lesion has geographic or wedge-shaped margins without mass effect. Normal intrahepatic vessels course through the area without displacement. No internal calcification, cystic change, or abnormal vascularity is demonstrated on color Doppler imaging. The surrounding liver parenchyma shows diffuse fatty infiltration.

Report Line

A focal geographic hypoechoic area is noted within a diffusely fatty liver, measuring approximately ____ × ____ mm. The area demonstrates no mass effect, with normal intrahepatic vessels traversing through it without displacement. No internal calcification, cystic change, or abnormal vascularity is identified on color Doppler imaging. Findings are suggestive of hepatic focal fatty sparing.

Impression

Features are consistent with hepatic focal fatty sparing, a benign hepatic pseudolesion occurring within diffuse hepatic steatosis. No sonographic evidence of a true focal hepatic mass lesion.

Key Learning Points

• Focal fatty sparing is a benign pseudolesion and should not be mistaken for a hepatic tumor.
• It is typically seen in the background of diffuse hepatic steatosis.
• Common locations include the gallbladder fossa, falciform ligament, porta hepatis, and subcapsular regions.
• The lesion appears hypoechoic relative to the surrounding fatty liver.
• There is no mass effect, and normal portal and hepatic veins traverse the lesion without displacement.
• Color Doppler demonstrates normal vascular architecture without abnormal internal vascularity.
• Important differential diagnoses include hepatocellular carcinoma, metastasis, focal nodular hyperplasia, hepatic adenoma, hemangioma, and focal fatty infiltration.

Recommendation

Clinical and laboratory correlation is recommended. Typical sonographic appearances usually require no treatment. If imaging features are atypical or clinical suspicion persists, contrast-enhanced CT or MRI may be performed to exclude a true focal hepatic lesion.