Cystic Lesions of the Pancreas.

Pancreatic cystadenomas are a group of benign, premalignant, and malignant cystic tumors of the pancreas. Serous cystadenomas are benign lesions that often do not require surgical excision unless they are complicated by bleeding, obstruction, or pain. Mucinous cystadenomas are premalignant lesions that may be surgically excised if there is a concern regarding malignant degeneration. However, it may be difficult to predict the timing and risk of malignant change. Also, it is controversial whether all mucinous cystadenomas should be resected. Cystadenocarcinomas should be surgically managed if they are resectable, that is, there is no evidence of metastatic disease. Intraductal papillary mucinous tumors share many features with mucinous cystadenomas. However, intraductal papillary mucinous tumors arise from the pancreatic duct and are often associated with a dilated pancreatic duct. These lesions are often managed with surgical resection, including total pancreatectomy for diffuse lesions with evidence of localized malignancy.