Endoscopic ultrasound-guided fine needles biopsy (EUS-FNB) represents the gold standard method for the diagnosis of solid pancreatic lesions (SPLs), even if a non-negligible risk of false-negative or inconclusive results still exists.
In such cases, major guidelines recommend repeating EUS-guided tissue sampling. Nevertheless, this recommendation is not based on high-quality evidence and little is known about the performance of repeated EUS-FNB (rEUS-FNB).
The primary aim of this study is to evaluate the diagnostic accuracy of rEUS-FNB after a previous non-diagnostic or inconclusive EUS-guided sampling of SPLs.
The secondary aims of this study are to evaluate rEUS-FNB sensitivity, specificity, positive predictive value, negative predictive value, specimen adequacy, Bethesda classification, adverse events incidence and factors that influenced rEUS-FNB performance.
