• True Cyst –a closed sac lined with epithelium
- Mucinous cystadenoma:
These cysts are usually located in the body or tail of the pancreas and occur most often in middle-aged women. Most of these are cancerous.
- Mucinous duct ectasia:
More common in men, these cysts consist of dilated ductal segments, usually within the head of the pancreas. Also known as intraductal papillary mucinous neoplasms, these growths are often cancerous.
- Serous cystadenoma:
These growths can become large enough to displace nearby organs, causing such symptoms as abdominal pain and a feeling of fullness. They occur most frequently in middle-aged women and become cancerous very rarely.
- Papillary cystic tumor:
The least common of the nonpseudocysts, papillary cystic tumors — also known as papillary cystic neoplasm or solid and pseudopapillary neoplasm — occur most often in young women and are usually located in the body or tail of the pancreas. They are usually cancerous.
- Islet cell tumors:
Also known as neuroendocrine tumors, are less common and more likely to be benign. Normally, the pancreas' islet cells produce insulin and other hormones. Islet cell tumors can also produce these hormones.
• Pseudocyst -here the cyst is not lined by epithelium instead it is surrounded by fibrous tissue.
- Most common pancreatic cystic lesions (about 75% to 80% of all pancreatic cystic lesions.