Case 366:   Abscess (amebic)

Diagnostic Category:

Clinical Presentation:

41 year old man returning from a long journey around the world with right epigastric pain and fever.

CT: Large, with typical "double-rim" sign

Imaging Findings:

Large round abscess in the hepatic dome with "double-rim sign": hypervascular capsule (hyperdense inner rim) surrounded by compressed hepatic parenchyma and edema (hypodense outer rim).

Location on the right hepatic lobe, large size, round shape and absent loculationes are typical for amebic abscesses. However similar features can be found in pyogenic abscesses.