Characteristics of the magnetic resonance imaging examination of nonfunctional pancreatic neuroendocrine neoplasms

Pancreatic neuroendocrine neoplasms (pNENs) are rare tumors with malignant potential. The pNENs could be classified into functional or nonfunctional according to associated clinical symptoms. Magnetic resonance imaging (MRI) is helpful for preoperative diagnosis of nonfunctional pNENs. The clinical data of 22 patients with nonfunctional pNENs who were admitted to the Chinese PLA General Hospital from March 2010 to February 2014 were analyzed retrospectively. Nonfunctional pNENs were characterized by moderate to marked, consistent or progressive enhancement with capsule like enhancement on dynamic contrast MRI, which is very important for the diagnosis and differential diagnosis of pNENs.