Abstract #4445

Role of tomoelastography for the differentiation between solid pseudopapillary neoplasms and pancreatic neuroendocrine neoplasms

Jiaxin Yuan¹, Siya Shi¹, Liqin Wang¹, Xuefang Hu¹, Jinhui Yu¹, Tingting Wen¹, Shiting Feng¹, Zhenpeng Peng¹, and Yanji Luo²

¹The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China, ²The First Affiliated Hospital, Sun Yat-Sen University, Guanghzou, China

Synopsis

Keywords: Pancreas, MR Value, Magnetic resonance elastographies,SPNs,pNENsThis prospective study enrolled patients with pathologically confirmed solid pseudopapillary tumors (SPNs) and pancreatic neuroendocrine tumors (pNENs) who underwent preoperative tomoelastography examinations at our hospital. Sixty-four patients were included (18 patients with SPNs; 46 patients with pNENs). SPNs showed significantly lower stiffness (P<0.001) and fluidity (P=0.001) than pNENs. Both stiffness and fluidity allowed distinguishing SPNs from pNENs. AUCs were 0.899 for stiffness, 0.760 for fluidity. Tomoelastography is a novel multi-frequency MRE technique that can facilitate the differentiation between SPNs and pNENs.

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