There is often heterogeneity within the lesions with benign and malignant appearing regions making it impossible to exclude malignancy with preoperative biopsy. Mucinous cystic neoplasms are commonly ...

Final diagnosis was based on a composite standard: histologic evidence at surgery, or non-equivocal malignant ... was pancreatic head in 73% of cases, the body in 20% and the tail in 7%.