False-negative rate of endoscopic ultrasound-guided fine-needle aspiration for pancreatic solid and cystic lesions with matched surgical resections as the gold standard: one institution's experience.

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.

Nodular lymphocyte-predominant Hodgkin lymphoma presenting as fulminant hepatic failure in a pediatric patient: a case report with pathologic, immunophenotypic, and molecular findings.

A 7-year-old boy presented with fulminant hepatic failure requiring liver transplant. Serologic testing ruled out infectious and autoimmune causes. During transplant surgery he was found to have enlarged periportal lymph nodes that were biopsied.