Fate of small pancreatic cysts (<3 cm) after long-term follow-up: analysis of significant radiologic characteristics and proposal of follow-up strategies.

• Almost all small cysts < 3 cm were indolent in long term observation. • No cysts < 15 mm, without p-duct change showed significant change within 3 years. • Cyst size, ductal change and shape can be useful in predicting progress. • Only cysts with IPMN- like features and p-duct change need follow-up with cautions.