Purpose
Solid pseudopapillary tumor (SPT) of the pancreas is a rare low malignant pancreatic neoplasm,
accounting for approximately 1%~2% of exocrine pancreatic tumors.
The characteristic findings have reported of SPTs include encapsulation,hemorrhage,
calcification,
mixed solid and cystic components et al
We collected pathologically proved SPTs,
analyzed CT,
MRI findings and pathological features.
Apart from review of common image signs,
we analyzed the image and pathology correlation,
as well as details on tumor composition,
size et al and found statistically differences in certain characteristics between different groups....
Methods and Materials
Patient selection
We reviewed a series of 53 cases in our hospital between Jan 2005 and Feb 2012.
Patients with histopathologic confirmed SPTs who had undergone material-enhanced CT or MRI prior to surgery were included.These included 5 male and 48 female (mean age: 33 years; age range,
13-68 years).
21 of 48 female were younger than 30 years old.
The pathologic results were conducted under the 2000th edition World Health Organization(WHO) Classification of Tumors which defined SPTs with specific vessels and nerves invasion,
invasion to...
Results
Overview
Location: 23 in head,
15 in tail,
14 in body and tail with an obscure boundary,
and 1 in neck.
Morphology and diameter: 90.9% (46 of 53) were round or ellipse and 9.1% (7 of 53) appeared to be nodular or lobular.
The average maximum diameter of tumors is 5.8cm(range,
1-13)±2.9 (standard deviation) .
Internal components: 83% (44 of 53) tumors were cystic-solid masses constituted with varied solid portion and 75.5% (40 of 53) had more than 50% solid portion.
15.1% (8 of 53)...
Conclusion
In conclusion,
in our study,
small SPTs usually appeared as purely solid lesions with few capsules and sometimes can cause pancreatic infiltration and pancreatic duct dilation.
Small SPTs usually show gradual enhancement which is not higher than the pancreatic parenchyma and peripheral enhancement is also observed sometimes.
Most middle and large SPTs are solid-cystic masses with clear margin,
capsule,
and progressive delayed enhancement.
Large SPTs incline to have more sharp margins and hemorrhage.
No significant difference was found in the imaging features listed in our...
References
1.Cantisani V,Mortele Kj,Levy A,et al.
MR imaging features of solid Pseudopapillary tumor of the pancreas in adult and pediatric patients.AJR Am J Roentgenol 2003;181(2):395-401.
2.Choi JY,Kim MJ,Kim JH,et al.
Solid pseudopapillary tumor of the pancreas: typical and atypical manifestations.
AJR Am J Roentgenol 2006:187(2):W178-W186.
3.Hu S,Cui N,Zhao E.
Solid-pseudopapillary tumor of the pancreas: one case report and literature review.
Clin Oncol Cancer Res 2009;6(2):155-156.
4.Peng fei Y,
Zhen hua H,
Xin bao W,
et al.
Solid pseudopapillary tumor of the pancreas: A review of 553...
Personal Information
Xuanzi Chengqian MD.
Department of Diagnostic Imaging,
Cancer Institute and Hospital.Chinese Academy of Medical Sciences,
Peking Union Medical College,
Beijing,
China.
E-mail:
[email protected]
Xinming ZhaoMD.
Department of Diagnostic Imaging,
Cancer Institute and Hospital.Chinese Academy of Medical Sciences,
Peking Union Medical College,
Beijing,
China.
Chunwu ZhouMD.
Department of Diagnostic Imaging,
Cancer Institute and Hospital.Chinese Academy of Medical Sciences,
Peking Union Medical College,
Beijing,
China.