World Journal of Oncology, ISSN 1920-4531 print, 1920-454X online, Open Access
Article copyright, the authors; Journal compilation copyright, World J Oncol and Elmer Press Inc
Journal website https://www.wjon.org

Case Report

Volume 12, Number 6, December 2021, pages 240-245

Immunoglobulin G4-Negative Inflammatory Pseudotumors of the Pancreas

Figures

Figure 1.
Figure 1. Representative images from MRI. (a) Abrupt cut off of the main pancreatic duct on the T2 sequence. (b) Hypoenhancing mass, measuring 2.4 × 1.9 × 3.2 cm, on the contrast study. MRI: magnetic resonance imaging.
Figure 2.
Figure 2. (a) Pancreas parenchyma with intact lobular architecture and exuberant chronic inflammation (low power, × 10). (b) Chronic inflammatory infiltrate (black arrow) and giant cell (black arrowhead) (medium power, × 20).
Figure 3.
Figure 3. (a) Focally positive immunostain for IgG (medium power, × 20). (b) Negative immunostain for IgG4 (medium power, × 20). IgG4: immunoglobulin G4.
Figure 4.
Figure 4. CK-7 was positive in epithelial cells (medium power, × 20). CK-7: cytokeratin 7.