Molecular diagnosis of solid and cystic lesions of the pancreas.

Pancreatic cancer presents at a clinically advanced stage. Diagnosis often is delayed in those who undergo several negative investigations, and at times, the diagnosis ultimately is made at surgery. Tumor suppressor-linked microsatellite allelic loss analysis appears to improve the diagnostic accuracy of inconclusive cytology specimens. Science, however, still suffers from the lack of a reliable biomarker for the purpose of screening and early detection. The continued study of sera and pancreatic juice hopefully will lead to the discovery of molecular biomarkers capable of diagnosing preclinical disease in at-risk groups.The ability to predict the underlying biologic behavior of pancreatic cystic neoplasia is less than ideal. Tumor suppressor-linked microsatellite allelic loss and telomerase analysis show promise, but they have not been studied extensively. Proteomic analysis of pancreatic cyst fluid, although not yet reported, also may prove valuable in guiding clinical management.