Answer: Contrast-enhanced CT of the abdomen and pelvis demonstrates a well-defined, nodular 1.3 cm enhancing lesion within the parenchyma of the pancreatic tail. The lesion is similar in attenuation to the adjacent spleen on both arterial and delayed phases. The adjacent pancreatic tissue is normal in appearance.
Based on the imaging features, which of these is the LEAST likely diagnosis?
A) Pancreatic islet cell tumor
B) Intrapancreatic accessory spleen
C) Pancreatic ductal adenocarcinoma
D) Hypervascular metastasis
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