Role of endosonography in non-malignant pancreatic diseases

Table 1 Features of chronic pancreatitis

EUS criteria	Appearance	Histological correlate
Hyperechoic foci	Small distinct focus of bright echo	Focal fibrosis
Hyperechoic strands	Small string like bright echo	Bridging fibrosis
Lobularity	Rounded homogenous areas separated by hyperechoic strands	Fibrosis, glandular atrophy
Cyst	Abnormal anechoic round or oval structure	Cysts, pseudocyst
Calcification	Hyperechoic lesion with acoustic shadowing	Parenchymal calcification
Ductal dilation	> 3 mm in head, > 2 mm in body, > 1 mm in tail	Duct dilation
Side branch dilation	Small anechoic structure outside the main pancreatic duct	Side branch dilation
Duct irregularity	Coarse uneven outline of the duct	Focal dilation, narrowing
Hyperechoic duct margins	Hyperechoic margins of the main pancreatic duct	Periductal fibrosis