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Published on: February 1, 2020
Solid pseudopapillary tumor of the pancreas: cross-sectional imaging and pathologic correlation
Xiuzhong Yao1, Yuan Ji, Mengsu Zeng
1Department of Radiology, Zhongshan Hospital, Fudan University, Shanghai, China.
Pancreas
|November 27, 2009
Summary
Imaging features of solid pseudopapillary tumors of the pancreas (SPTP) differ based on size. Large SPTPs show typical features, while small ones are atypical, highlighting the need for advanced imaging like MRI for accurate diagnosis.
Area of Science:
- Gastroenterology
- Radiology
- Oncology
Background:
- Solid pseudopapillary tumor of the pancreas (SPTP) is a rare pancreatic neoplasm.
- Accurate preoperative diagnosis is crucial for appropriate management.
Purpose of the Study:
- To evaluate the cross-sectional imaging features of SPTP.
- To correlate imaging findings with pathologic characteristics.
- To differentiate between large and small SPTPs based on imaging.
Main Methods:
- Retrospective analysis of 29 histopathologically confirmed SPTP cases.
- Correlation of imaging features with pathological findings.
- Classification of tumors into large (>3.0 cm) and small (≤3.0 cm) based on size.
Main Results:
- Large SPTPs typically present as well-encapsulated masses with solid-cystic and hemorrhagic areas, showing peripheral enhancement with progressive fill-in.
- Small SPTPs often appear as rarely encapsulated masses without significant hemorrhage or cystic changes, exhibiting gradual enhancement.
- Pathologic correlation confirmed the imaging findings, including fibrous pseudocapsules and variegated solid-cystic-necrotic areas.
Conclusions:
- Imaging appearances of SPTP vary significantly with tumor size.
- Magnetic resonance imaging (MRI) is superior to computed tomography (CT) in delineating tumor capsule, solid-cystic components, and hemorrhagic areas.
- MRI aids in avoiding misdiagnosis of SPTP.
