Transient hepatic attenuation difference (THAD)
Known case of liver cirrhosis underwent radiofrequency ablation for hepatic focal lesions
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An arterio-portal shunt is developed between the left hepatic artery and left branch of portal vein and responsible for the patchy abnormal enhancement of the left hepatic lobe. Successful ablation of two hepatic focal lesions with no viable tumoral tissue detected.
The transient hepatic attenuation difference may occur as a result of portal vein thrombosis or A-V fistula which alter the regional blood supply to the liver. In this case the A-V fistula developed either due to direct infiltration of hepatocellular carcinoma or from radiofrequency ablation.
- Itai Y. Interpretation of transient hepatic attenuation differences in dynamic CT. Radiographics. 2001;21 (4): 875-6. Radiographics (full text) - Pubmed citation
- Stefano Colagrande, Nicoletta Centi, Giorgio La Villa and Natale Villari. Transient Hepatic Attenuation Differences. American Journal of Roentgenology 2004 183:2, 459-464