18 F-FDG and 68 Ga-FAPI-04 PET/CT Imaging of a Case With Immunoglobulin G4-Related Disease Presenting as Hepatic Masses.

Zhang, Zeyu; Jiang, Hui; Zhang, Lu; Cheng, Chao; Zuo, Changjing · Clin Nucl Med · 2022

case_report · Level V

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Abstract

Two hepatic masses were discovered through ultrasonography in a 50-year-old man with increased CA19-9, which is highly suspicious for malignancy. PET/CT images revealed intense 18 F-FDG and 68 Ga-FAPI-04 uptake in intrahepatic lesions. Histopathology with biopsy confirmed the diagnosis of immunoglobulin G4 (IgG4)-related disease. Here, we reported a case of IgG4-related primary localized pseudotumor without any other organ involvement. We concluded that in clinical work, if intrahepatic masses show high uptake of 18 F-FDG or 68 Ga-FAPI-04, intrahepatic IgG4-related disease should be considered for differential diagnosis.

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