False‐negative rate of endoscopic ultrasound‐guided fine‐needle aspiration for pancreatic solid and cystic lesions with matched surgical resections as the gold standard

BACKGROUND The diagnosis of pancreatic tumors is often complicated because of sampling and interpretive challenges. The current study was performed to determine the rates, types, and causes of diagnostic discrepancies. METHODS The authors retrospectively reviewed cytology cases from 2004 to 2010 using matched surgical resection cases as the gold standard. RESULTS A total of 733 cases were divided into 3 categories: 1) positive or suspicious (290...