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100 1 _ |a Demmert, Tristan T
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245 _ _ |a Oncologic Staging with 68Ga-FAPI PET/CT Demonstrates a Lower Rate of Nonspecific Lymph Node Findings Than 18F-FDG PET/CT.
260 _ _ |a New York, NY
|c 2023
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500 _ _ |a 2023 Dec 1;64(12):1906-1909
520 _ _ |a Nonspecific lymph node uptake on 18F-FDG PET/CT imaging is a significant pitfall for tumor staging. Fibroblast activation protein α expression on cancer-associated fibroblasts and some tumor cells is less sensitive to acute inflammatory stimuli, and fibroblast activation protein-directed PET may overcome this limitation. Methods: Eighteen patients from our prospective observational study underwent 18F-FDG and 68Ga fibroblast activation protein inhibitor (FAPI) PET/CT scans within a median of 2 d (range, 0-22 d). Lymph nodes were assessed on histopathology and compared with SUV measurements. Results: On a per-patient basis, lymph nodes were rated malignant in 10 (56%) versus 7 (39%) patients by 18F-FDG PET/CT versus 68Ga-FAPI PET/CT scans, respectively, with a respective accuracy of 55% versus 94% for true lymph node metastases. Five of 6 (83%) false-positive nodes on the 18F-FDG PET/CT scans were rated true negative by the 68Ga-FAPI PET/CT scans. On a per-lesion basis, tumor detection rates were similar (85/89 lesions, 96%). Conclusion: 68Ga-FAPI PET/CT imaging demonstrated higher accuracy for true nodal involvement and therefore has the potential to replace 18F-FDG PET/CT imaging for cancer staging.
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650 _ 7 |a 18F-FDG PET/CT
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650 _ 7 |a 68Ga-FAPI PET/CT
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650 _ 7 |a lymph node staging
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650 _ 7 |a oncologic staging
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700 1 _ |a Pomykala, Kelsey L
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700 1 _ |a Lanzafame, Helena
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700 1 _ |a Pabst, Kim M
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700 1 _ |a Lueckerath, Katharina
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700 1 _ |a Siveke, Jens
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700 1 _ |a Umutlu, Lale
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700 1 _ |a Hautzel, Hubertus
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700 1 _ |a Hamacher, Rainer
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700 1 _ |a Herrmann, Ken
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700 1 _ |a Fendler, Wolfgang P
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