What does IPMN mean?

IPMN, an acronym for Intraductal Papillary Mucinous Neoplasm, is a cause of pancreatitis in which there is a transformation of the cells that line the pancreatic duct into premalignant cells —cells that display characteristics that may develop into pancreatic cancer— that produce mucous and block off the pancreatic …

What is mixed type IPMN?

Intraductal Papillary Mucinous Neoplasms (IPMNs) are cystic lesions with mucin-producing cells that develop from the pancreatic ducts. These cystic neoplasms are more common after the fifth decade of life, affecting both sexes in similar proportions [1,2].

What is a IPMN branch?

An IPMN is a mucinous cyst characterized by its viscous fluid. IPMNs develop inside the main pancreatic duct and its branches. Some IPMNs reach out into the pancreatic duct system or branches of the duct. These are called branch duct IPMN.

Are IPMNs slow growing?

Conclusion: In a retrospective analysis of images from patients with BD-IPMN, we found low-risk BD-IPMNs to grow at an extremely low rate (less than 0.3 mm/year). BD-IPMNs in only about 6% of patients developed worrisome features, and none developed high-risk features or invasive cancers.

Are all IPMN cancerous?

Intraductal papillary mucinous neoplasm (IPMN) is a type of cyst that is found in the pancreas. These cysts are benign – meaning they are not cancerous to start. However, they are concerning because in a minority of cases an IPMN can develop into malignant (cancerous) tumors.

How fast do IPMN grow?

BD-IPMN growth rate of 2 mm/year had a sensitivity of 78 %, specificity of 90 %, and accuracy of 88 % to identify malignancy. Total BD-IPMN growth was also associated with increased risk of malignancy (P = 0.003) with all malignant IPMNs growing at least 10 mm prior to cancer diagnosis.

Can IPMN shrink?

Two of the IPMNs actually decreased in size. This observation has also been reported by Irie et al. in IPMN, but is unusual in cystic neoplasms that are not IPMN. We believe that the decrease in size is explained by either changes in the blood supply, decreased mucin production, or emptying of the mucin into the MPD.