| EUS criteria for CP | MST definition* | Histological correlate |
| Hyperechoic foci | Small distinct reflectors | Focal fibrosis |
| Hyperechoic strand | Small string-like hyperechoic structures | Bridging fibrosis |
| Lobular out gland margin | No MST definition | Fibrosis, glandular atrophy |
| Lobularity | Containing lobules-rounded homogeneous areas separated by strands of another echogenicity | Interlobular fibrosis |
| Cyst | Abnormal anechoic round or oval structure | Cysts/pseudocysts |
| Stone | Hyperechoic lesion with acoustic shadowing within a duct or gallbladder | Calcified stones |
| Calcification | Hyperechoic lesion with acoustic shadow within a parenchymal organ or a mass | Parenchymal calcification |
| Ductal dilation | No MST definition | >3 mm in head, >2 mm in body, >1 mm in tail |
| Side branch dilation | No MST definition | Side branch dilation |
| Duct irregularity | Coarse, uneven outline of the duct | Focal dilation/narrowing |
| Hyperechoic duct margins | No MST definition | Periductal fibrosis |
| Atrophy | No MST definition | Atrophy |
| Inhomogeneous echo pattern | No MST definition | Edema |
