Table 1. Imaging recommendations for hepatocellular and biliary tract cancer surveillance .

NCCN: National Comprehensive Cancer Network; AASLD: American Association for the Study of Liver Diseases

Journal	Type of cancer	Duration of surveillance imaging
NCCN	Hepatocellular Carcinoma	“At least 5 years; and thereafter screening is dependent on HCC risk factors” [4]
NCCN	Biliary Tract Cancer	“Up to 5 years, or as clinically indicated" [4]
AASLD	Hepatocellular Carcinoma	“The optimal timing and duration of surveillance after surgical resection is unknown, although AASLD recommends indefinite surveillance" [5]