Guerrache Youcef, Soyer Philippe, Dohan Anthony, Faraoun Sid Ahmed, Laurent Valérie, Tasu Jean-Pierre, Aubé Christophe, Cazejust Julien, Boudiaf Mourad, Hoeffel Christine
Department of Radiology, Centre Pierre et Marie Curie, Place du 1er Mai, 16016 Alger, Algeria.
Department of Abdominal Imaging, Hôpital Lariboisière-APHP, 2, rue Ambroise Paré, 75010 Paris, France; Université Paris-Diderot, Sorbonne Paris Cité, 10 Avenue de Verdun, 75010 Paris, France.
Clin Imaging. 2014 Jul-Aug;38(4):475-482. doi: 10.1016/j.clinimag.2014.01.015. Epub 2014 Feb 7.
Solid-pseudopapillary tumor (SPT) of the pancreas is a rare, low-grade malignancy, which mostly occurs in adolescent and young adult females. The goal of this study was to retrospectively analyze the magnetic resonance (MR) imaging presentation of SPT of the pancreas.
We retrospectively reviewed the preoperative MR imaging examinations and the medical, surgical and histopathological records of 21 patients who underwent surgery for SPT of the pancreas. MR imaging included T1-weighted, T2-weighted, and gadolinium chelate-enhanced MR imaging. In addition, 10 patients had diffusion-weighted (DW) MR imaging. MR examinations were retrospectively reviewed for location, size, morphological features and signal intensity of the tumors.
Nineteen women and 2 men (median age, 23 years; range, 14-59) were included. Seven patients (7/21; 33%) presented with abdominal symptoms. The median largest tumor diameter was 53mm (range, 32-141 mm). SPTs were located in the pancreatic head, body, and tail in 9 (9/21; 43%), 5 (5/21; 24%) and 7 (7/21, 33%) patients, respectively. All patients (21/21; 100%) had a single SPT. SPTs were more frequently oval (12/21; 57%), predominantly solid (12/21; 57%), fully encapsulated (16/21; 76%), larger than 30 mm (21/21; 100%), hypointense on T1-weighted MR images (21/21, 100%), hyperintense on T2-weighted MR images (21/21; 100%) and with an enhancing capsule after gadolinium-chelate administration (21/21; 100%).
There is trend of appearance for SPT of the pancreas on MR imaging but that variations may be observed in a number of cases. SPT uniformly presents as a single, well-demarcated and encapsulated pancreatic mass.
胰腺实性假乳头状瘤（SPT）是一种罕见的低级别恶性肿瘤，主要发生于青春期及年轻成年女性。本研究的目的是回顾性分析胰腺SPT的磁共振（MR）成像表现。
我们回顾性分析了21例接受胰腺SPT手术患者的术前MR成像检查以及医学、手术和组织病理学记录。MR成像包括T1加权、T2加权和钆螯合物增强MR成像。此外，10例患者进行了扩散加权（DW）MR成像。对MR检查进行回顾，以观察肿瘤的位置、大小、形态特征和信号强度。
纳入19名女性和2名男性（中位年龄23岁；范围14 - 59岁）。7例患者（7/21；33%）出现腹部症状。肿瘤最大直径的中位数为53mm（范围32 - 141mm）。SPT分别位于胰头、胰体和胰尾的患者有9例（9/21；43%）、5例（5/21；24%）和7例（7/21；33%）。所有患者（21/21；100%）均为单发SPT。SPT更常呈椭圆形（12/21；57%），主要为实性（12/21；57%），完全包膜完整（16/21；76%），大于30mm（21/21；100%），在T1加权MR图像上呈低信号（21/21；100%），在T2加权MR图像上呈高信号（21/21；100%），钆螯合物注射后包膜强化（21/21；100%）。
胰腺SPT在MR成像上有一定的表现趋势，但在一些病例中可能会观察到变异。SPT一致表现为单一、边界清晰且有包膜的胰腺肿块。
