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 |
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