18F-FDG PET/CT Versus 18F-FAPI PET/CT in Eosinophilic Liver Infiltration

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Abstract
A 48-year-old man presented with upper abdominal discomfort for 10 days. Abdominal contrast-enhanced CT showed multiple abnormal enhanced masses in liver, suggesting a probability of malignancies. The patient was then enrolled in a clinical trial of comparison of 18F-FDG and 18F-FAPI PET/CT in hepatic lesions. Compared with 18F-FDG PET/CT, 18F-FAPI PET/CT showed higher tracer uptake, more lesions in liver. Meanwhile, peripheral blood eosinophils increased remarkably. The hepatic lesions were highly suspected as eosinophilic liver infiltration. Finally, pathologic analysis confirmed the diagnosis of eosinophilic liver infiltration.

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