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Magnetic Resonance Imaging Spectrum of Solid Pseudopapillary Neoplasm of the Pancreas

Chae, Seung Hoon MD*; Lee, Jeong Min MD, PhD*†; Baek, Ji Hyun MD*†; Shin, Cheong Il MD*†; Yoo, Mi Hye MD*; Yoon, Jeong-Hee MD*; Kim, Jung Hoon MD, PhD*†; Han, Joon Koo MD, PhD*†; Choi, Byung Ihn MD, PhD*†

Journal of Computer Assisted Tomography:
doi: 10.1097/01.rct.0000445639.26581.65
Abdominal Imaging
Abstract

Objective: To describe the magnetic resonance imaging spectrum of solid pseudopapillary tumors (SPTs), with an emphasis on solid SPTs.

Methods: Thirty-two patients with proven SPTs with preoperative magnetic resonance were included. The SPTs were classified into 3 types: solid, cystic, and mixed; and 2 radiologists analyzed the images regarding the morphologic features and enhancement pattern.

Results: Of 11 solid SPTs, 9 SPTs (81.8%) were less than 3 cm. Alternatively, of the 18 mixed SPTs and 3 cystic SPTs, 15 SPTs (71.4%) were larger than 3 cm. The predominant imaging features were homogeneous hypoenhancement with a gradually incremental enhancement pattern showing a sharp margin without hemorrhage, whereas those of the mixed SPTs were heterogeneous enhancement showing a sharp margin with internal hemorrhage.

Conclusion: Solid SPTs frequently present as small, well-defined tumors with a gradual enhancement and without hemorrhage or necrosis, and with features that differ from those of mixed or cystic SPTs.

Author Information

From the *Department of Radiology, and †Institute of Radiation Medicine, Seoul National University Hospital, Seoul, Korea.

Received for publication April 24, 2013; accepted July 16, 2013.

Reprints: Jeong Min Lee, MD, Department of Radiology, and Institute of Radiation Medicine, Seoul National University College of Medicine, 28 Yeongon-dong, Jongno-gu, Seoul 110–744, Korea (e-mail: jmsh@snu.ac.kr; jmlshy@naver.com).

The authors declare no conflict of interest.

© 2014 by Lippincott Williams & Wilkins