FIGURE 3.

MR images in a 46-year-old woman with an atypical SPT. (A) Axial T2-weighted image showed an ill-defined high signal intensity tumor in the neck of the pancreas, accompanied by distal parenchymal ductal dilatation. (B) DWI with b = 1,500 s/mm² showed a hyperintense tumor. (C–F) Axial T1-weighted images obtained during plain (C), arterial (D), portal venous (E), and delayed (F) phases. The tumors showed hypovascular enhancement in the arterial phase, gradual enhancement in the portal venous, and progressive hyperenhancement in delayed phases when compared with the adjacent parenchyma. The diagnosis of pre-operation MRI was PNET. However, the radiomics analysis showed that the tumor was SPT.