EUS guided cyst wall brushing and residual fluid aspirated after lavage with 2 cc of sterile normal saline The tip of the Echobrush and the saline used to lavage the cyst will be placed in the same specimen jar (Specimen 2) based on the discussion with published experts on the EchoBrush technique. It should be noted that the pancreatic cyst will be punctured with the 19G FNA needle only once to obtain the specimens mentioned above. A single pass with EUS-FNA is the standard of care for pancreatic cysts and this study does not alter standard of care. It should be noted that the two groups represent two samples from the same patient and same cystic lesion. Therefore each patient will serve as their own internal control. All patients will be considered for surgical resection. Patients who do not undergo surgical resection will be followed up per standard of care.