IgG4 related disease as a mimicker of metastatic pancreatic cancer

Pancreatic cancer detected with 18F-FDG PET/CT in IgG4-related disease patient

“…IgG4-RD patients with focal masses in the pancreas should be carefully followed for early detection of complicating malignancies. Distinguishing between these two entities is crucial to prevent unnecessary pancreatic resections [5] . In cases where patients exhibit multiple organ involvement with highly suspected or pathologically confirmed IgG4-RD, and limited lesions are detected prior to immunosuppressive therapy, FNA biopsy pathology should be performed whenever possible to clarify the diagnosis and exclude malignancy tumor.…”