Table 2.

Ancillary features favouring either malignancy or benignity

Ancillary features favouring malignancy in general	Ancillary features favouring benignity
• US visibility as discrete nodule	• Size stability > 2 years
• Subthreshold growth	• Size reduction
• Restricted diffusion	• Enhancement parallels blood pool
• Mild to moderate T2 hyperintensity	• Undistorted vessels
• Corona enhancement	• Iron in mass (more than liver)
• Fat sparing in solid mass	• Marked T2 hyperintensity
• Iron sparing in solid mass	• Hepato-biliary phase isointensity
• Transitional phase hypointensity
• Hepato-biliary phase hypointensity
Favouring HCC in particular
• Non-enhancing “capsule”
• Nodule-in-nodule
• Mosaic architecture
• Blood products in mass
• Fat in mass, more than adjacent liver