fig1

Figure 1. Worldwide incidence (cases/100,000) of cholangiocarcinoma (CCA). Data refer to the period 1971-2009. Green colour identifies areas with lower incidence (< 6/100,000 cases, rare cancer), while pink colour indicates countries where CCA is not a rare cancer (> 6/100,000 cases). Diagnoses have been classified according to the International Classification of Diseases (ICD-O-1, ICD-O-2, ICD-O-3, ICD-10, ICD-V9, ICD-V10, ICD-O). Where available, the more incident form [intrahepatic (IH) vs. extrahepatic (EH) CCA] and the temporal trend of incidence (↑increasing trend; ↕stable trend; ↓decreasing trend) have been reported. This figure was modified from Banales et al.^[3] with permission