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Background There are different types of pancreatic cysts.They can be classified by different ways. Each of them has different plan of management. that is why their differentiation became mandatory before setting their treatment plans. Aim of the study To Evaluate PGE2 as a marker of differentiation of mucin containing pancreatic cysts and prediction of dysplasia in these cyst. A Secondary aim is differentiation of mucin from non mucin containing pancreatic cystic lesions Patients and Methods 40 patients were recruited from the Department of Internal Medicine and the Outpatient Clinic of Cairo University hospital in the period between December 2018 and August 2019. A case control study design was adopted where the patients were grouped as follow : Group 1 - composed of 20 patients with pancreatic mucinous cystic lesions defined by EUS guided samples, Histopathology and Radiological findings. Group 2: - composed of 20 patients with pancreatic non mucinous cystic lesions defined by EUS guided samples, Histopathology and Radiological findings. Results In our study, there was a significant differences in PGE2 level between true and inflammatory pancreatic cysts (p = 0.001) .However, there is insignificant differences between mucinous, non mucinous (p = 0.406). There was insignificant differences between different grades of IPMN dysplasia (p = 0.615) Conclusion Prostaglandin E2 is pancreatic cystic fluid marker which can be used for differentiation between true pancreatic cysts from inflammatory pancreatic cysts which have different plans of management. Prostaglandin E2 is not good marker to be used for differentiation between different grades of IPMN dysplasia.

Evaluation of pancreatic cyst prostaglandin E2 as a Marker for Differentiation between Mucinous and Non Mucinous Cysts and Prediction of Dysplasia in Mucinous Pancreatic Cysts