Pancreatic Cysts: China's 2022 Guideline on Diagnosis and Surveillance
Most pancreatic cysts are harmless and most pancreatic surgery is avoidable. China's 2022 guideline defines which cyst features warrant endoscopic ultrasound, which warrant surgery, and which simply warrant watching.
Pancreatic cystic neoplasms are being found far more often than they used to be, simply because more people have abdominal imaging. Most of these cysts will never cause a problem, but a minority are premalignant, and telling the two apart is the entire clinical challenge.
China's 2022 diagnostic guideline for pancreatic cystic neoplasms - produced by the National Clinical Research Center for Digestive Diseases with the Chinese Medical Doctor Association pancreatic disease committee, using a modified Delphi process - offers 17 graded recommendations. Its overall message is restraint: distinguish carefully, operate selectively, and avoid over-treatment.
The main types
Symptoms are unreliable
Imaging first
Endoscopic ultrasound is not required for every cyst. It is recommended when imaging shows worrisome features: cyst larger than 3 cm, a mural nodule over 5 mm, thickened or enhancing wall, main pancreatic duct dilatation beyond 5 mm, abrupt duct cut-off with upstream atrophy, lymphadenopathy, rising CA19-9, or growth of 5 mm or more over two years. Combining EUS with cross-sectional imaging improves diagnostic accuracy.
