Pyogenic liver abscess

Case contributed by Dr Laughlin Dawes


Right upper quadrant pain and fever.

Patient Data

Age: 75
Gender: Female

CT demonstrates a large irregular fluid-density lesion within the right lobe of the liver with rim enhancement (inner rim) and a thin outer ring of hypoattenuation ("double target sign"). There are multiple smaller peripheral lesions with similar characteristics. Some of these appear coalescent forming "cluster sign". This is the typical appearance for a pyogenic liver abscess.

Case Discussion

Percutaneous CT-guided drainage was performed. A heavy growth of Streptococcus milleri was grown.

The most common organisms found in pyogenic liver abscess are Staphylococcus aureus in children and Escherichia coli in adults. Differential diagnoses include: amoebic abscess, hydatid cyst, cystic metastasis, and biliary cystadenocarcinoma.

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Case information

rID: 35962
Published: 7th May 2015
Last edited: 11th Jul 2019
Inclusion in quiz mode: Included

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