Radiological parameters to predict pancreatic texture: Current evidence and future perspectives

Table 1 Summary of studies evaluating the role of transabdominal ultrasonography in assessing pancreatic texture

Ref.	Number of patients	Aim	Results	Conclusion	Histological correlation
Yashima et al[27], 2012	98	Efficacy of elastography to diagnose chronic pancreatitis	SWV cut off – 1.40 m/s; Sensitivity 75%; Specificity 72%; PPV 69%; NPV 78%	SWV in chronic pancreatitis patients higher than healthy volunteers	Not evaluated
Harada et al[29], 2016	68	Correlation of SWV with pathological degree of fibrosis	SWV cut off – 1.54 m/s; Sensitivity 91%; Specificity 75%; PPV 67%; NPV 93%	SWV significantly correlated with grade of fibrosis and postoperative pancreatic fistula	Good
Llamoza-Torres et al[30], 2016	33	Accuracy of elastography to diagnose chronic pancreatitis	SWV cut off - 1.4 m/s; Sensitivity 58%; Specificity 81%; PPV 76%; NPV 65%	SWV significantly correlated with EUS findings	Not evaluated

SWV: Shear wave velocity; PPV: Positive predictive value; NPV: Negative predictive value; EUS: Endoscopic ultrasonography.