Figure 1

Overview of the EMUC-CT classification system, based on Graeter et al. (Left) Primary morphological types I–V and their subcriteria. (Right) Patterns of calcification. (EMUC-CT = Echinococcus multilocularis Ulm Classification for Computed Tomography). The two columns of classification are primarily considered separately; then, in principal, they can be freely combined. There are two exceptions: (1) The calcification pattern called “with a central calcification*” can only occur in lesions with type IV primary morphology, and (2) primary morphology type V is not associated with a pattern of calcification.