“…These procedures include the use of labelled red blood cells for diagnosing haemangiomas and the use of 99m Tc sulphur colloid and 99m Tc mebrofenin (HIDA) for FNH. In FNH, specific features have been described, such as the uptake of 99m Tc mebrofenin by functional hepatocytes and reduced biliary drainage compared to normal liver parenchyma, as evidenced by tracer retention in the delayed images of FNH [2][3][4]. The uptake of colloids in FNH is mediated by Kupffer cells according to the extent of their function/existence in these tumours, which explains these typical findings [2][3][4].…”