2013 Volume 28 Issue 2 Pages 141-147
Invasive carcinoma derived from IPMN appears as colloid carcinoma or tubular adenocarcinoma. In general, colloid carcinoma shows a better prognosis compared to tubular adenocarcinoma. Therefore, the histological type of carcinoma should be included as part of the pathological report of IPMN. As the pathological definition of minimally invasive carcinoma derived from IPMN is not clear at the present time, the actual value of the distance from the pancreatic duct should be used. The morphological type of IPMN is useful for detecting the prognosis. The role of intraoperative frozen sections is important for determining the surgical margin. When the diagnosis of high grade or invasive carcinoma is made, additional resection should be performed. In specimen processing, the identification of the main pancreatic duct is critical, especially for distinguishing between BD-IPMN and MD-IPMN. Finally, the recognition of the definition of carcinoma derived from IPMN and carcinoma concomitant with IPMN is also important.
