Serous cystic tumors of the pancreas.

Serous cystic tumors of the pancreas are unique among pancreatic cystic neoplasms in that they are almost always cytologically monomorphous and biologically benign. The diagnostic challenge for the surgical pathologist is to recognize the spectrum of architectural variation that may lead to misdiagnosis, either preoperatively or postoperatively, and the additional lesions and conditions with which serous tumors may be associated.