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Yang L, Cheng L, Xu Y, Ding H, Gao X, Chang Z, Wang K. PET Imaging of Fibroblast Activation Protein in Various Cancers Using [ 18F]AlF‑NOTA‑FAPI‑04: Comparison with 18F-FDG in a Single-Center, Prospective Study. Acad Radiol 2024:S1076-6332(24)00226-5. [PMID: 38658210 DOI: 10.1016/j.acra.2024.04.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 04/08/2024] [Accepted: 04/12/2024] [Indexed: 04/26/2024]
Abstract
RATIONALE AND OBJECTIVES Targeting fibroblast-activation protein is a newer diagnostic approach for the visualization of tumor stroma, and a novel aluminum-[18F] fluoride (Al18F)-labeled fibroblast-activation protein inhibitor-4 (FAPI-04), hereafter [18F] AlF-NOTA-FAPI-04, presents a promising alternative to gallium 68 (68Ga)-labeled FAPI owing to its relatively longer half-life. This study sought to evaluate the clinical usefulness of [18F] AlF-NOTA-FAPI-04 PET/CT for the diagnosis of various types of cancer, compared to [18F] FDG PET/CT. MATERIALS AND METHODS In this prospective study conducted from October 2021 to January 2024, a total of 148 patients with 16 different tumor entities underwent contemporaneous 18F-FDG and 18F-FAPI-04 PET/CT either for an initial assessment or for recurrence detection. Uptake of 18F-FDG and 18F-FAPI-04 was quantified by the maximum standard uptake value (SUV max). Diagnostic sensitivity, specificity, and accuracy were compared by using the McNemar test between these two imaging agents. RESULTS 18F-FAPI-04 PET/CT could clearly depict 16 different types of cancer with excellent image contrast, thereby leading to a higher detection rate of primary tumors than did 18F-FDG PET/CT (98.06% vs. 81.55%, P<0.001). In per-lymph node analysis, the sensitivity, specificity, and accuracy in the diagnosis of metastatic lymph nodes were 92.44%, 90.44%, and 91.56%, respectively, which was much higher than that 18F-FDG PET/CT (80.23%, 79.41%, and 79.87%, respectively). Meanwhile, 18F-FAPI-04 PET/CT outperformed 18F-FDG PET/CT in identifying more suspected distant metastases (86.57% vs. 74.13%, P<0.001). Furthermore, 18F-FAPI-04 PET/CT upgraded tumor staging in 36/101 patients (35.6%), and detected tumor recurrence or metastases in 43/47 patients (91.49%). CONCLUSION Our findings demonstrated that primary and metastatic lesions in patients with various types of malignant tumors are well-visualized on 18F-FAPI-04 PET/CT, which exhibited a superior diagnostic performance than 18F-FDG PET/CT. Moreover, 18F-FAPI-04 PET/CT is a promising tool for tumor staging and follow-up of various malignancies.
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Affiliation(s)
- Liping Yang
- Department of PET-CT, Harbin Medical University Cancer Hospital, Harbin, China
| | - Liang Cheng
- Department of PET-CT, Harbin Medical University Cancer Hospital, Harbin, China
| | - Yuchao Xu
- School of Nuclear Science and Technology, University of South China, Hunan, China
| | - Hongchao Ding
- Department of Physical Diagnostics, Heilongjiang Provincial Hospital, Harbin, China
| | - Xing Gao
- Department of Physical Diagnostics, Heilongjiang Provincial Hospital, Harbin, China
| | - Zhengsong Chang
- Department of Pathology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Kezheng Wang
- Department of PET-CT, Harbin Medical University Cancer Hospital, Harbin, China.
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Polack M, Smit MA, van Pelt GW, Roodvoets AGH, Meershoek-Klein Kranenbarg E, Putter H, Gelderblom H, Crobach ASLP, Terpstra V, Petrushevska G, Gašljević G, Kjær-Frifeldt S, de Cuba EMV, Bulkmans NWJ, Vink GR, Al Dieri R, Tollenaar RAEM, van Krieken JHJM, Mesker WE. Results from the UNITED study: a multicenter study validating the prognostic effect of the tumor-stroma ratio in colon cancer. ESMO Open 2024; 9:102988. [PMID: 38613913 PMCID: PMC11033069 DOI: 10.1016/j.esmoop.2024.102988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 03/06/2024] [Accepted: 03/07/2024] [Indexed: 04/15/2024] Open
Abstract
BACKGROUND The TNM (tumor-node-metastasis) Evaluation Committee of Union for International Cancer Control (UICC) and College of American Pathologists (CAP) recommended to prospectively validate the cost-effective and robust tumor-stroma ratio (TSR) as an independent prognostic parameter, since high intratumor stromal percentages have previously predicted poor patient-related outcomes. PATIENTS AND METHODS The 'Uniform Noting for International application of Tumor-stroma ratio as Easy Diagnostic tool' (UNITED) study enrolled patients in 27 participating centers in 12 countries worldwide. The TSR, categorized as stroma-high (>50%) or stroma-low (≤50%), was scored through standardized microscopic assessment by certified pathologists, and effect on disease-free survival (DFS) was evaluated with 3-year median follow-up. Secondary endpoints were benefit assessment of adjuvant chemotherapy (ACT) and overall survival (OS). RESULTS A total of 1537 patients were included, with 1388 eligible stage II/III patients curatively operated between 2015 and 2021. DFS was significantly shorter in stroma-high (n = 428) than in stroma-low patients (n = 960) (3-year rates 70% versus 83%; P < 0.001). In multivariate analysis, TSR remained an independent prognosticator for DFS (P < 0.001, hazard ratio 1.49, 95% confidence interval 1.17-1.90). As secondary outcome, DFS was also worse in stage II and III stroma-high patients despite adjuvant treatment (3-year rates stage II 73% versus 92% and stage III 66% versus 80%; P = 0.008 and P = 0.011, respectively). In stage II patients not receiving ACT (n = 322), the TSR outperformed the American Society of Clinical Oncology (ASCO) criteria in identifying patients at risk of events (event rate 21% versus 9%), with a higher discriminatory 3-year DFS rate (stroma-high 80% versus ASCO high risk 91%). A trend toward worse 5-year OS in stroma-high was noticeable (74% versus 83% stroma-low; P = 0.102). CONCLUSION The multicenter UNITED study unequivocally validates the TSR as an independent prognosticator, confirming worse outcomes in stroma-high patients. The TSR improved current selection criteria for patients at risk of events, and stroma-high patients potentially experienced chemotherapy resistance. TSR implementation in pathology diagnostics and international guidelines is highly recommended as aid in personalized treatment.
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Affiliation(s)
- M Polack
- Department of Surgery, Leiden University Medical Center, Leiden
| | - M A Smit
- Department of Surgery, Leiden University Medical Center, Leiden
| | - G W van Pelt
- Department of Surgery, Leiden University Medical Center, Leiden
| | - A G H Roodvoets
- Clinical Research Center, Department of Surgery, Leiden University Medical Center, Leiden
| | | | - H Putter
- Department of Biomedical Data Sciences, Leiden
| | | | - A S L P Crobach
- Department of Pathology, Leiden University Medical Center, Leiden
| | - V Terpstra
- Department of Pathology, Haaglanden Medical Center, The Hague, The Netherlands
| | - G Petrushevska
- Department of Pathology, Medical Faculty of Ss. Cyril and Methodius University, Skopje, Republic of North Macedonia
| | - G Gašljević
- Department of Pathology, Onkološki inštitut-Institute of Oncology, Ljubljana, Slovenia
| | - S Kjær-Frifeldt
- Department of Pathology, Vejle Sygehus-Sygehus Lillebælt, Vejle, Denmark
| | | | | | - G R Vink
- Department of Medical Oncology, University Medical Center Utrecht, Utrecht University, Utrecht; Department of Research and Development, Netherlands Comprehensive Cancer Organisation (IKNL), Utrecht, The Netherlands
| | - R Al Dieri
- European Society of Pathology, Brussels, Belgium
| | | | - J H J M van Krieken
- Department of Pathology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - W E Mesker
- Department of Surgery, Leiden University Medical Center, Leiden.
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Li X, Lu N, Lin L, Chen Y, Yang S, Wang H, Liu X, Wu C, Xue X, Su X, Bai X, Liang T. 18F-FAPI-04 Outperforms 18F-FDG PET/CT in Clinical Assessments of Patients with Pancreatic Adenocarcinoma. J Nucl Med 2024; 65:206-212. [PMID: 38176719 PMCID: PMC10858376 DOI: 10.2967/jnumed.123.266283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 11/07/2023] [Indexed: 01/06/2024] Open
Abstract
Accurate diagnosis and staging are crucial for selecting treatment for patients with pancreatic ductal adenocarcinoma (PDAC). The desmoplastic responses associated with PDAC are often characterized by hypometabolism. Here, we investigated 18F-fibroblast activation protein inhibitor (FAPI)-04 PET/CT in evaluation of PDAC and compared the findings with those obtained using 18F-FDG. Methods: Sixty-two PDAC patients underwent 18F-FAPI-04 PET/CT and 18F-FDG PET/CT. Identification of primary lesions, lymph node (LN) metastasis, and distant metastasis (DM) by these methods was evaluated, and TNM staging was performed. Correlation between SUVmax of the primary lesion and treatment response was explored in patients who received systemic therapy. Results: 18F-FAPI-04 PET/CT identified all patients with PDAC; 18F-FDG PET/CT missed 1 patient. Tracer uptake was higher in 18F-FAPI-04 PET/CT than in 18F-FDG PET/CT in primary tumors (10.63 vs. 2.87, P < 0.0001), LN metastasis (2.90 vs. 1.43, P < 0.0001), and DM (liver, 6.11 vs. 3.10, P = 0.002; peritoneal, 4.70 vs. 2.08, P = 0.015). The methods showed no significant difference in the T staging category, but the N and M values were significantly higher for 18F-FAPI-04 PET/CT than for 18F-FDG PET/CT (P = 0.002 and 0.008, respectively). Thus, 14 patients were upgraded, and only 1 patient was downgraded, by 18F-FAPI-04 PET/CT compared with 18F-FDG PET/CT. A high SUVmax of the primary tumor did not correlate with treatment response for either 18F-FAPI-04 or 18F-FDG. Conclusion: 18F-FAPI-04 PET/CT performed better than 18F-FDG PET/CT in identification of primary tumors, LN metastasis, and DM and in TNM staging of PDAC.
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Affiliation(s)
- Xiang Li
- Department of Hepatobiliary and Pancreatic Surgery, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Pancreatic Disease, Hangzhou, China
| | - Na Lu
- Department of Hepatobiliary and Pancreatic Surgery, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Pancreatic Disease, Hangzhou, China
| | - Lili Lin
- Department of Nuclear Medicine, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yiwen Chen
- Department of Hepatobiliary and Pancreatic Surgery, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Pancreatic Disease, Hangzhou, China
| | - Shuye Yang
- Department of Nuclear Medicine, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Huatao Wang
- Department of Nuclear Medicine, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xinyuan Liu
- Department of Hepatobiliary and Pancreatic Surgery, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Pancreatic Disease, Hangzhou, China
| | - Chengyi Wu
- Department of Hepatobiliary and Pancreatic Surgery, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Pancreatic Disease, Hangzhou, China
| | - Xing Xue
- Department of Radiology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China; and
| | - Xinhui Su
- Department of Nuclear Medicine, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xueli Bai
- Department of Hepatobiliary and Pancreatic Surgery, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China;
- Zhejiang Provincial Key Laboratory of Pancreatic Disease, Hangzhou, China
| | - Tingbo Liang
- Department of Hepatobiliary and Pancreatic Surgery, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China;
- Zhejiang Provincial Key Laboratory of Pancreatic Disease, Hangzhou, China
- Zhejiang University Cancer Center, Hangzhou, China
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Chen J, Xu K, Li C, Tian Y, Li L, Wen B, He C, Cai H, He Y. [ 68Ga]Ga-FAPI-04 PET/CT in the evaluation of epithelial ovarian cancer: comparison with [ 18F]F-FDG PET/CT. Eur J Nucl Med Mol Imaging 2023; 50:4064-4076. [PMID: 37526694 DOI: 10.1007/s00259-023-06369-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Accepted: 07/26/2023] [Indexed: 08/02/2023]
Abstract
PURPOSE To compare the efficacy of [68Ga]Ga-FAPI-04 PET/CT in primary or recurrent tumors and metastatic lesions of epithelial ovarian cancer (EOC) with that of fluorine-18 fluorodeoxyglucose ([18F]F-FDG) PET/CT. METHODS Forty-nine patients (median age, 57 years; IQR, 51-66 years) with histologically proven primary or relapsed EOC were enrolled. Participants underwent [18F]F-FDG and [68Ga]Ga-FAPI-04 PET/CT. The detection rate, diagnostic accuracy, semiquantitative parameters, tumor staging, and clinical management of the tracers were compared. The diagnostic performance of [18F]F-FDG and [68Ga]Ga-FAPI-04 PET/CT was evaluated and compared using surgical pathology. Differences between methods regarding the peritoneal cancer index (PCI) using preoperative imaging, surgical PCI, and tumor markers (CA125, HE4) were also assessed regarding peritoneal metastases. RESULTS Among the 49 patients, 28 had primary EOC; 21 had relapsed EOC. [68Ga]Ga-FAPI-04 PET/CT outperformed [18F]F-FDG PET/CT in detecting peritoneal metastases (96.8% vs. 83.0%; p < 0.001), retroperitoneal (99.5% vs. 91.4%; p < 0.001), and supradiaphragmatic lymph node metastases (100% vs. 80.4%; p < 0.001). Compared with [18F]F-FDG, [68Ga]Ga-FAPI-04 showed higher SUVmax for peritoneal metastases (17.31 vs. 13.68; p = 0.026) and retroperitoneal (8.72 vs. 6.56; p < 0.001) and supradiaphragmatic lymph node metastases (6.39 vs. 4.20; p < 0.001). Moreover, [68Ga]Ga-FAPI-04 PET/CT showed higher sensitivity compared with [18F]F-FDG PET/CT for detecting metastatic lymph nodes (80.6% vs. 61.3%; p = 0.031) and peritoneal metastases (97.5% vs. 75.9%; p < 0.001), using surgical pathology as the gold standard. Compared with [18F]F-FDG PET/CT, [68Ga]Ga-FAPI-04 PET/CT led to an upgrade in 14.3% and 33.3% of treatment-naive and relapse participants, resulting in management changes in 10.7% and 19.0% of the patients, respectively. The median PCIFAPI scores were significantly higher than PCIFDG (15 vs. 11; p < 0.001) and positively correlated with CA125 and HE4 levels and surgical PCI. CONCLUSION [68Ga]Ga-FAPI-04 PET/CT achieved higher sensitivity than [18F]F-FDG PET/CT in the detection and diagnosis of lymph node and peritoneal metastases, suggesting advantages regarding the preoperative staging of patients with EOC and, thereby, improving treatment decision-making. TRIAL REGISTRATION NCT05034146. Registered February 23, 2021.
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Affiliation(s)
- Jie Chen
- Department of Nuclear Medicine, Zhongnan Hospital of Wuhan University, No.169 Donghu Road, Wuhan, 430071, China
| | - Kui Xu
- Department of Nuclear Medicine, Zhongnan Hospital of Wuhan University, No.169 Donghu Road, Wuhan, 430071, China
| | - Chongjiao Li
- Department of Nuclear Medicine, Zhongnan Hospital of Wuhan University, No.169 Donghu Road, Wuhan, 430071, China
| | - Yueli Tian
- Department of Nuclear Medicine, Zhongnan Hospital of Wuhan University, No.169 Donghu Road, Wuhan, 430071, China
| | - Ling Li
- Department of Nuclear Medicine, Zhongnan Hospital of Wuhan University, No.169 Donghu Road, Wuhan, 430071, China
| | - Bing Wen
- Department of Nuclear Medicine, Zhongnan Hospital of Wuhan University, No.169 Donghu Road, Wuhan, 430071, China
| | - Can He
- Department of Gynecological Oncology, Zhongnan Hospital of Wuhan University, No.169 Donghu Road, Wuhan, 430071, China
| | - Hongbing Cai
- Department of Gynecological Oncology, Zhongnan Hospital of Wuhan University, No.169 Donghu Road, Wuhan, 430071, China.
| | - Yong He
- Department of Nuclear Medicine, Zhongnan Hospital of Wuhan University, No.169 Donghu Road, Wuhan, 430071, China.
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Abstract
Computed tomography (CT), MR imaging, and PET with fluorodeoxyglucose F18/CT are commonly used for radiation therapy planning; however, issues including precise nodal staging on CT or false positive results on PET/CT limit their usability. Clinical trials using fibroblast activation protein ligands for additional imaging have provided promising results regarding staging and target volume delineation-particularly suitable for sarcoma, some gastrointestinal tumors, head and neck tumors, and lung and pancreatic cancer. Although further prospective trials are necessary to identify clinical settings for its application in radiation oncology, fibroblast activation protein inhibitor PET/CT indisputably represents an excellent opportunity for assisting radiotherapy planning.
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Affiliation(s)
- Stefan A Koerber
- Department of Radiation Oncology, Heidelberg University Hospital, Heidelberg, Germany; Clinical Cooperation Unit Radiation Oncology, German Cancer Research Center, Heidelberg, Germany; Department of Radiation Oncology, Barmherzige Brueder Hospital Regensburgh, Regensburg, Germany.
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Strating E, van de Loo A, Elias S, Lam M, Kranenburg O. Fibroblast Activation Protein Inhibitor-PET Imaging in Colorectal Cancer. PET Clin 2023:S1556-8598(23)00016-0. [PMID: 37030984 DOI: 10.1016/j.cpet.2023.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2023]
Abstract
Fibroblast activation protein inhibitor (FAPI)-PET imaging holds great promise for improving the clinical management of colorectal cancer. High fibroblast activation protein expression is particularly observed in lymph node metastases, in the aggressive Consensus Molecular Subtype 4, in peritoneal metastases, and in tumors that respond poorly to immunotherapy. We have defined six clinical dilemmas in the diagnosis and treatment of colorectal cancer, which FAPI-PET may help solve. Future clinical trials should include patients undergoing tumor resection, allowing correlation of FAPI-PET signals with in-depth histopathological, cellular, and molecular tissue analyses.
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Affiliation(s)
- Esther Strating
- Division of Imaging and Cancer, Laboratory Translational Oncology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, G.04.2.28, Utrecht, the Netherlands
| | - Anne van de Loo
- Division of Imaging and Cancer, Laboratory Translational Oncology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, G.04.2.28, Utrecht, the Netherlands
| | - Sjoerd Elias
- Department of Epidemiology, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, STR.6.131, Utrecht, the Netherlands
| | - Marnix Lam
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, E.01.1.32, Utrecht, the Netherlands.
| | - Onno Kranenburg
- Division of Imaging and Cancer, Laboratory Translational Oncology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, G.04.2.28, Utrecht, the Netherlands.
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FAPI PET/CT in Diagnostic and Treatment Management of Colorectal Cancer: Review of Current Research Status. J Clin Med 2023; 12:jcm12020577. [PMID: 36675506 PMCID: PMC9865114 DOI: 10.3390/jcm12020577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 12/27/2022] [Accepted: 01/09/2023] [Indexed: 01/12/2023] Open
Abstract
FAPI PET/CT is a novel imaging tool targeting fibroblast activation protein (FAP), with high tumor uptake rate and low background noise. Therefore, the appearance of FAPI PET/CT provides a good tumor-to-background ratio between tumor and non-tumor tissues, which is beneficial to staging, tumor description and detection. Colorectal cancer has the biological characteristics of high expression of FAP, which provides the foundation for targeted FAP imaging. FAPI PET/CT may have a potential role in changing the staging and re-staging of colorectal cancer, monitoring recurrence and treatment management, and improving the prognosis of patients. This review will summarize the application status of FAPI PET/CT in colorectal cancer and provide directions for further application research.
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