What are Non-neoplastic Pancreatic Cysts? Mucosal layer of retetion cyst (H&E stain, ×200).Rare nonneoplastic cysts of pancreas. Kim YS, Cho JH - Clinical endoscopy (2015). Not Altered. CC. Non-neoplastic pancreatic cysts are unilocular cysts that tend to be benign lesions of the pancres. Examples of non-neoplastic pancreatic cysts include: Congenital pancreatic cystsPancreatic pseudocysts Post navigation Previous Post What is Chronic Pancreatitis?Next PostWhat are Congenital Pancreatic Cysts?