COMPUTED TOMOGRAPHY IMAGING FEATURES OF SMALL (≤ 3 CM) SOLID PSEUDOPAPILLARY TUMORS OF THE PANCREAS

Tóm tắt

Background: Solid pseudopapillary tumors (SPTs) of the pancreas is a low-grade malignant tumor, accounting for only 1–2.5% of all pancreatic tumors. In particular, small (≤ 3 cm) SPTs do not often have typical computed tomography (CT) features, making them easily misdiagnosed with other solid tumors and eventually affecting the choice of treatment method.

Purpose: To describe CT features of small (≤ 3 cm) SPTs. Materials and Methods: This is a retrospective, descriptive crosssectional study. SPT patients were admitted under the following inclusion criteria: (1) SPTs were pathologically verified at the University Medical Center Ho Chi Minh City from April 2016 to April 2022, (2) SPTs had maximal diameter ≤ 3 cm on preoperative CT scans.

Results: 10 small SPTs have atypical imaging (100%), a slight preference for the body region (40%), round shape (50%), solid components (100%), sharp margin and smooth border (90%), encapsulation (0%), peripheral calcification (30%), enhancement weaker than that of the adjacent pancreatic parenchyma during the arterial phase (90%), heterogeneous enhancement pattern (60%), no biliary or pancreatic ductal dilatation, no metastatic disease.

Conclusions: The CT features of small SPTs are atypical. They appear as purely solid tumors and should be differentiated from other solid tumors.