Halil Kömek1, Canan Can2, Yunus Güzel2, Zeynep Oruç3, Cihan Gündoğan2, Özgen Ahmet Yildirim4, İhsan Kaplan2, Erkan Erdur4, Mehmet Serdar Yıldırım5, Bahri Çakabay6. 1. Department of Nuclear Medicine, Gazi Yasargil Training and Research Hospital, 21070, Kayapınar, Diyarbakir, Turkey. halilkomek@gmail.com. 2. Department of Nuclear Medicine, Gazi Yasargil Training and Research Hospital, 21070, Kayapınar, Diyarbakir, Turkey. 3. Department of Medical Oncology, Faculty of Medicine, Dicle University, Diyarbakır, Turkey. 4. Department of Internal Medicine, Division of Medical Oncology, Gazi Yasargil Training and Research Hospital, Diyarbakir, Turkey. 5. Department of Internal Medicine, Gazi Yasargil Training and Research Hospital, Diyarbakir, Turkey. 6. Department of Surgical Oncology, Gazi Yasargil Training and Research Hospital, Diyarbakir, Turkey.
Abstract
AIM: We aimed to compare the roles of 68Ga-FAPI-04 PET/CT and 18F-FDG PET/CT in the evaluation of primary tumor and metastases in primary and recurrent breast cancer. MATERIALS AND METHOD: Twenty female patients with histopathologically confirmed primary and recurrent breast cancer were included in the prospective study. All patients underwent FDG and FAPI PET/CT imaging in the same week. The number of primary and metastatic lesions, SUVmax values, and tumor-to-background ratios (TBR) were recorded from both scans. Data obtained were statistically compared. RESULTS: FAPI PET/CT was superior to FDG in detecting breast lesions, as well as hepatic, bone, lymph node, and cerebral metastases in terms of patient- and lesion-based assessments. The sensitivity and specificity of FAPI in detecting primary breast lesions were 100% and 95.6%, respectively, while the sensitivity and specificity of FDG were 78.2% and 100%, respectively. The SUVmax values of primary breast tumors, lymph nodes, lung metastases, and bone metastases were significantly higher on FAPI imaging than FDG imaging (p < 0.05). However, SUVmax values of hepatic metastases did not exhibit a statistically significant difference between two imaging techniques (p > 0.05). Also, FAPI imaging yielded significantly higher TBR in breast lesions as well as hepatic, bone, brain and lung metastases compared to FDG (p < 0.05). CONCLUSION: 68 Ga-FAPI-04 PET/CT is superior to 18F-FDG PET/CT in detecting the primary tumor in patients with breast cancer with its high sensitivity, high SUVmax, and high TBR. 68 Ga-FAPI-04 PET/CT is also superior to 18F-FDG PET/CT in detecting lymph node, hepatic, bone, and cerebral metastases because it has lower background activity and higher uptake in subcentimetric lesions.
AIM: We aimed to compare the roles of 68Ga-FAPI-04 PET/CT and 18F-FDG PET/CT in the evaluation of primary tumor and metastases in primary and recurrent breast cancer. MATERIALS AND METHOD: Twenty female patients with histopathologically confirmed primary and recurrent breast cancer were included in the prospective study. All patients underwent FDG and FAPI PET/CT imaging in the same week. The number of primary and metastatic lesions, SUVmax values, and tumor-to-background ratios (TBR) were recorded from both scans. Data obtained were statistically compared. RESULTS: FAPI PET/CT was superior to FDG in detecting breast lesions, as well as hepatic, bone, lymph node, and cerebral metastases in terms of patient- and lesion-based assessments. The sensitivity and specificity of FAPI in detecting primary breast lesions were 100% and 95.6%, respectively, while the sensitivity and specificity of FDG were 78.2% and 100%, respectively. The SUVmax values of primary breast tumors, lymph nodes, lung metastases, and bone metastases were significantly higher on FAPI imaging than FDG imaging (p < 0.05). However, SUVmax values of hepatic metastases did not exhibit a statistically significant difference between two imaging techniques (p > 0.05). Also, FAPI imaging yielded significantly higher TBR in breast lesions as well as hepatic, bone, brain and lung metastases compared to FDG (p < 0.05). CONCLUSION: 68 Ga-FAPI-04 PET/CT is superior to 18F-FDG PET/CT in detecting the primary tumor in patients with breast cancer with its high sensitivity, high SUVmax, and high TBR. 68 Ga-FAPI-04 PET/CT is also superior to 18F-FDG PET/CT in detecting lymph node, hepatic, bone, and cerebral metastases because it has lower background activity and higher uptake in subcentimetric lesions.
Entities:
Keywords:
18F-FDG; 68 Ga-FAPI; Breast Cancer; PET/CT
Authors: E Novruzov; K Dendl; H Ndlovu; P L Choyke; M Dabir; M Beu; F Novruzov; E Mehdi; F Guliyev; S A Koerber; I Lawal; G Niegisch; J Debus; U Haberkorn; M Sathekge; F L Giesel Journal: Mol Imaging Biol Date: 2022-03-29 Impact factor: 3.484