Fig. 1

Chronological changes seen on CT. a: First examination. The hypo-enhanced mass was 4.2 × 3.9 cm in size with solid and cystic lesions located in the uncus of the pancreas. b: At 21 months after first examination. The tumor shown is 3.9 × 3.6 cm in size. The cystic lesion (yellow arrow) had become smaller and the solid lesion (white arrow) had become larger. c: At 28 months after first examination. The tumor was 4.2 × 3.3 cm in size. The cystic lesion changed and displayed irregular margins