"Sonic hedgehog-activated hepatocellular adenomas (sh-HCA) are a subtype of hepatocellular adenomas."
"Most of sh-HCA were previously grouped under the unclassified adenomas, but they have been shown to represent 4-10% of all adenomas 2-4."
"MRI remains the modality of choice when working up hepatocellular adenomas. Unfortunately, there are no specific imaging features for sh-HCA, with diagnosis mostly suggested on exclusion."
"Fluid-filled cavities within the tumour have been pointed as a particular feature of sh-HCA compared to the other subtypes 2. These do not enhance, with the fluid representing products of haemoglobin degradation."