Serous cystadenomas are a type of cystic neoplasm of the pancreas. These lesions are more frequent in those greater than age 70 and are more common in women. They are commonly quite large at the time of diagnosis measuring on average 5-8cm. Even though they are large they almost never cause jaundice and uncommonly will block the pancreatic duct. Thus, they are usually asymptomatic and are most usually found on diagnostic imaging performed for other reasons.