Abstract #2323

Differentiation of solid pseudopapillary tumor and neuroendocrine tumor of pancreas using enhanced T2 * weighted angiography

Longshuang Wang¹, Yi Wang², Ailian Liu³, and Qinhe Zhang³

¹School of Medical Imaging,Dalian Medical University,Dalian, China, Dalian Liaoning, China, ²Department of Radiology, Dalian Friendship Hospital, Dalian, China, Dalian Liaoning, China, ³Department of Radiology, the First Affiliated Hospital of Dalian Medical University, Dalian Liaoning, China

It is difficult to differentiate the solid pseudopapillary tumor of the pancreas (SPTP) from pancreatic neuroendocrine tumors (PNET), due to their similar imaging characteristics. Enhanced T2 * weighted angiography (ESWAN) technique can simultaneously obtain amplitude, phase, R2 * and T2 * values, which can quantitatively assess the magnetic sensitivity characteristics of tissues. There was significant difference in R2 * (AUC: 0.707; sensitivity: 91.3%; specificity: 46.7%)and T2*(AUC: 0.829; sensitivity: 73.9%; specificity: 86.7%)between SPTP and PNET. Therefore, ESWAN may be an effective method to identify SPTP and PNET.

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