Randomized Trial Comparing the Flexible 19G and 25G Needles for Endoscopic Ultrasound-Guided Fine Needle Aspiration of Solid Pancreatic Mass Lesions: Retraction

Retraction notice for the article that appeared on page 128 of the January 2015 issue of the Pancreas journal. The randomized trial involved 72 patients between two participating centers. The published article includes 100 patients. The authors added 28 patients to show statistically that there was no difference in the main outcomes measures despite changing the sample size to 100 patients. The 28 patients with large pancreatic masses were subjects of another similar randomized trial (NCT01815606: Trial Comparing 19 and 25G Needles for Fine Needle Aspiration (FNA) of Solid Pancreatic Mass Lesions Greater Than 35 mm) that has not been published or findings analyzed; the authors do not intend to publish the findings of that trial. The intent of the authors’ was only to prove that an increase in sample size would have no bearing on the eventual findings of the study. It was not their intent to include this sample in the publication.