Endoscopic ultrasound elastography for solid pancreatic lesions

Table 1 Results of 4 large studies using pattern recognition of elastography for diagnosis of solid pancreatic lesions

Author	Giovannini et al[4], 2006		Giovannini et al[8], 2009		Janssen et al[9], 2007			Iglesias-Garcia et al[10], 2009
	Elastic score /pattern	Interpretation	Score	Inter-pretation	Type	Color	Interpretation	Pattern	Interpretation
Score and interpretation	Distortion for entire low echo area	Normal pancreas	A (elastic score 1 and 2)	Benign	Homogeneous	A = blue	B = normal pancreas	Homogeneous green	Normal pancreas
	No distortion on low echo area even for a part	Fibrosis, chronic pancreatitis						Heterogenous green	Inflammatory pancreas
	Distortion at the edge of low echo area, even for a part	Small adeno-carcinoma	B (elastic score 3)	Indeter-minate	2 or 3 colors	B = green/yellow		Homogeneous blue	Ductal pancreatic adenocarcinoma
	No distortion for entire low echo area	Endocrine tumor	C (elastic score 4 and 5)	Malignant	Heterogeneous	C = red	A/B = chronic pancreatitis and neoplasia	Heterogeneous blue	Neuroendocrine tumor
	No distortion on low echo area and surrounding	Advanced adeno-carcinoma
Sensitivity	100		92.3		65.9 (chronic pancreatitis),			100
					93.8 (neoplasia)
Specificity	67		80		56.9 (chronic pancreatitis),			85.5
					65.4 (neoplasia)
Accuracy	NA		89.2		60.2 (chronic pancreatitis), 73.5 (neoplasia)			94

NA: Not available.