To guide treatment a consensus document was published by the International Association of Pancreatology in 2006 and updated in 2012. The guidelines recommend the surgical resection of all pancreatic cysts that cause symptoms or are larger than 3 cm, contain a mural nodule or are associated with dilatation of the main pancreatic duct. If the cyst is less than 3cm and does not have any of these features the guidelines recommend that the lesions can be safely followed up with serial imaging. They recommended annual imaging for lesions <10mm, 6 monthly imaging for lesions 1020mm and 3 monthly imaging for lesions >20mm. How long patients should be followed up for or when they should be referred for surgical resection is unclear and is associated with a growing surveillance cost to the NHS.