Question: BACKGROUND: Multiple Ultrasound tests & CT scans (with contrast) looking for NAFLD/Non-Alcoholic Fatty Liver Disease, NASH/Non-Alcoholic Steatohepatitis, Liver Fibrosis & Cirrhosis. (2013) Abd. CT with IV contrast report: "... Liver within normal limits." (2014) Abd. Ultrasound report: "liver is prominent in size... demonstrates increased echogenicity likely reflecting fatty infiltration. No focal liver lesion is seen." (2017) Abd. CT with IV contrast: "hepatomegaly measuring 26 cm in length with diffuse steatosis." (2019) Abd. Ultrasound "... liver is enlarged in size measuring 18.8 cm in length. There is diffuse increased echogenicity to liver parenchyma likely reflecting fatty infiltration. No focal hepatic lesion is noted." QUESTION: What could explain the 2- 1/2 inch "shrinkage" in liver size from 26 cm. on CT back in 2017 to current liver size 18.8 cm. on recent (2019) Ultrasound (other than possible fibrosis or cirrhosis)? By how much margin of error could either the CT scans & Ultrasounds be inaccurate from the actual liver size? Shouldn't both tests reflect roughly the same sizes (if there is no fibrosis/cirrhosis)?

Sorry, forgot to add the following info: 2014 Ultrasound report: "...common bile duct measures 5mm." Current (2019) Ultrasound report: "...common bile duct measures 3mm." Does this difference or "shrinkage" in the bile duct size point more likely toward an actual shrinkage of the liver, rather than a discrepancy in size measurement of the liver between the old CT scan and the current Ultrasound?