scholarly journals Expression of FAP in Lung Cancer and Its Correlation With the Tumor Glucose Metabolism and the Histopathology

2022 ◽  
Author(s):  
Xiaohui Chen ◽  
Xinran Liu ◽  
Lijuan Wang ◽  
Wenlan Zhou ◽  
Yin Zhang ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Glucose Metabolism ◽  
Fdg Pet ◽  
Univariate Analysis ◽  
Tumor Grade ◽  
Expression Level ◽  
Tumor Diameter ◽  
Maximal Diameter ◽  
Pet Ct ◽  
Fdg Pet Ct

Abstract Purpose To explore the expression of fibroblast activation protein (FAP) in lung cancer (LC) and its correlation with tumor glucose metabolism and histopathology.Methods From June 2018 to November 2020, a total of 73 patients with newly diagnosed LC were included. Immunohistochemical staining was used to quantify the FAP expression in the tumors. The histopathological type and tumor grade were determined on the histopathological examination. Tumor glucose metabolic parameters and tumor maximal diameter were measured on [18F] F-FDG PET/CT. Univariate and multivariate analysis were used to study the correlation between FAP expression level and glucose metabolic variables and various histopathology.Results Positive FAP expression was observed in 97.3% (71/73) of LC lesions, which was significantly higher than 87.7% (64/73) of [18F] F-FDG positivity on PET/CT (χ2=4.818, P=0.028). In 12 early adenocarcinomas (ADCs), only 3 lesions (25%) were positive on PET/CT, however, 10 lesions (83.3%) were positive with FAP expression. When FAP expression was classified to low level (scores≤3) and high level (scores>4), high FAP level was found in 80.8% tumors and low FAP level in other 19.2% tumors. High FAP level was identified in 100.0% of squamous cell carcinoma (SCC), 85.7% of ADCs, 66.7% (4/6) of large cell neuroendocrine carcinoma (LCNC) and 40.0% (4/10) of small cell lung cancer (SCLC)(P<0.05). In the non-mucinous ADC lesions, on univariate analysis, FAP expression level showed close relationships with tumor metabolism parameters (SUVmax, SUVmean, and TLG), tumor diameter, tumor grade and lesion attenuation (P<0.05).Conclusion The present study demonstrates that FAP expresses widely in LC and has a great variant level in different histopathological types. High positive rate of FAP expression implies FAP targeted imaging may be a sensitive modality for diagnosing LC, especially for early ADCs, and may serve as an alternative of [18F] F-FDG PET/CT.

scholarly journals Change of Apoptosis and Glucose Metabolism in Lung Cancer Xenografts during Cytotoxic and Anti-Angiogenic Therapy Assessed by Annexin V Based Optical Imaging and 18F-FDG-PET/CT

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Jasmin Gross ◽  
Karin Palmowski ◽  
Dennis Doleschel ◽  
Anne Rix ◽  
Felix Gremse ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Glucose Metabolism ◽  
Fdg Pet ◽  
Annexin V ◽  
Vessel Density ◽  
Angiogenic Therapy ◽  
Apoptosis Imaging ◽  
Pet Ct ◽  
18F Fdg ◽  
Fdg Pet Ct

Aim of the Study. To compare Annexin V-based optical apoptosis imaging with the assessment of the glucose metabolism using 18F-FDG-PET/CT for monitoring the response to cytotoxic (carboplatin) and anti-angiogenic (sunitinib) therapy. Methods. For apoptosis imaging, the near-infrared probe Annexin Vivo750 was used in combination with fluorescence molecular tomography and microcomputed tomography (FMT/µCT). Glucose metabolism was assessed using 18F-FDG-PET/CT. Five groups of nude mice bearing lung cancer xenografts (A549) were investigated: (i) untreated controls and two groups after (ii) cytotoxic (carboplatin) or (iii) anti-angiogenic (sunitinib) treatment for four and nine days, respectively. Imaging data were validated by immunohistochemistry. Results. In response to carboplatin treatment, an inverse relation was found between the change in glucose metabolism and apoptosis in A549 tumors. Annexin Vivo showed a continually increasing tumor accumulation, while the tumor-to-muscle ratio of 18F-FDG continuously decreased during therapy. Immunohistochemistry revealed a significantly higher tumor apoptosis ( p = 0.007 ) and a minor but not significant reduction in vessel density only at day 9 of carboplatin therapy. Interestingly, during anti-angiogenic treatment there was an early drop in the tumor-to-muscle ratio between days 0 and 4, followed by a subsequent minor decrease (18F-FDG tumor-to-muscle-ratio: 1.9 ± 0.4; day 4: 1.1 ± 0.2; day 9: 1.0 ± 0.2; p = 0.021 and p = 0.001 , respectively). The accumulation of Annexin Vivo continuously increased over time (Annexin Vivo: untreated: 53.7 ± 36.4 nM; day 4: 87.2 ± 53.4 nM; day 9: 115.1 ± 103.7 nM) but failed to display the very prominent early induction of tumor apoptosis that was found by histology already at day 4 (TUNEL: p = 0.0036 ) together with a decline in vessel density (CD31: p = 0.004 ), followed by no significant changes thereafter. Conclusion. Both molecular imaging approaches enable visualizing the effects of cytotoxic and anti-angiogenic therapy in A549 tumors. However, the early and strong tumor apoptosis induced by the anti-angiogenic agent sunitinib was more sensitively and reliably captured by monitoring of the glucose metabolism as compared to Annexin V-based apoptosis imaging.

Enhancing 18F-FDG-PET/CT analysis in lung cancer patients

2015 ◽  
Vol 54 (06) ◽  
pp. 247-254 ◽  
Author(s):  
A. Kapfhammer ◽  
T. Winkens ◽  
T. Lesser ◽  
A. Reissig ◽  
M. Steinert ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Image Fusion ◽  
Chest Wall ◽  
Fdg Pet ◽  
Ct Image ◽  
Lung Cancers ◽  
Pet Ct ◽  
Peripheral Lung ◽  
Fdg Pet Ct ◽  
Tumour Infiltration

SummaryAim: To retrospectively evaluate the feasibility and value of CT-CT image fusion to assess the shift of peripheral lung cancers with/-out chest wall infiltration, comparing computed tomography acquisitions in shallow-breathing (SB-CT) and deep-inspiration breath-hold (DIBH-CT) in patients undergoing FDG-PET/ CT for lung cancer staging. Methods: Image fusion of SB-CT and DIBH-CT was performed with a multimodal workstation used for nuclear medicine fusion imaging. The distance of intrathoracic landmarks and the positional shift of tumours were measured using semitransparent overlay of both CT series. Statistical analyses were adjusted for confounders of tumour infiltration. Cutoff levels were calculated for prediction of no-/infiltration. Results: Lateral pleural recessus and diaphragm showed the largest respiratory excursions. Infiltrating lung cancers showed more limited respiratory shifts than non-infiltrating tumours. A large respiratory tumour-motility accurately predicted non-infiltration. However, the tumour shifts were limited and variable, limiting the accuracy of prediction. Conclusion: This pilot fusion study proved feasible and allowed a simple analysis of the respiratory shifts of peripheral lung tumours using CT-CT image fusion in a PET/CT setting. The calculated cutoffs were useful in predicting the exclusion of chest wall infiltration but did not accurately predict tumour infiltration. This method can provide additional qualitative information in patients with lung cancers with contact to the chest wall but unclear CT evidence of infiltration undergoing PET/CT without the need of additional investigations. Considering the small sample size investigated, further studies are necessary to verify the obtained results.

scholarly journals Prognostic Significance of Metabolic Parameters by 18F-FDG PET/CT in Thymic Epithelial Tumors

Cancers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 712
Author(s):  
Joohee Lee ◽  
Young Seok Cho ◽  
Jhingook Kim ◽  
Young Mog Shim ◽  
Kyung-Han Lee ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Prognostic Factors ◽  
Fdg Pet ◽  
Univariate Analysis ◽  
Thymic Epithelial Tumors ◽  
Epithelial Tumors ◽  
Masaoka Stage ◽  
Pet Ct ◽  
18F Fdg ◽  
Fdg Pet Ct

Background: Imaging tumor FDG avidity could complement prognostic implication in thymic epithelial tumors. We thus investigated the prognostic value of volume-based 18F-fluorodeoxyglucose (18F-FDG) positron emission tomography (PET)/CT parameters in thymic epithelial tumors with other clinical prognostic factors. Methods: This is a retrospective study that included 83 patients who were diagnosed with thymic epithelial tumors and underwent pretreatment 18F-FDG PET/CT. PET parameters, including maximum and average standardized uptake values (SUVmax, SUVavg), metabolic tumor volume (MTV), and total lesion glycolysis (TLG), were measured with a threshold of SUV 2.5. Univariate and multivariate analysis of PET parameters and clinicopathologic variables for time-to-progression was performed by using a Cox proportional hazard regression model. Results: There were 21 low-risk thymomas (25.3%), 27 high-risk thymomas (32.5%), and 35 thymic carcinomas (42.2%). Recurrence or disease progression occurred in 24 patients (28.9%). On univariate analysis, Masaoka stage (p < 0.001); histologic types (p = 0.009); treatment modality (p = 0.001); and SUVmax, SUVavg, MTV, and TLG (all p < 0.001) were significant prognostic factors. SUVavg (p < 0.001) and Masaoka stage (p = 0.001) were independent prognostic factors on multivariate analysis. Conclusion: SUVavg and Masaoka stage are independent prognostic factors in thymic epithelial tumors.

scholarly journals Impact of [18F]FDG-PET and [18F]FLT-PET-Parameters in Patients with Suspected Relapse of Irradiated Lung Cancer

Diagnostics ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 279
Author(s):  
Tine N. Christensen ◽  
Seppo W. Langer ◽  
Gitte Persson ◽  
Klaus Richter Larsen ◽  
Annemarie G. Amtoft ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Overall Survival ◽  
Fdg Pet ◽  
Tumor Volume ◽  
High Dose ◽  
Flt Pet ◽  
Pet Ct ◽  
Radiation Induced ◽  
Fdg Pet Ct ◽  
Induced Changes

Radiation-induced changes may cause a non-malignant high 2-deoxy-2-[18F]fluoro-d-glucose (FDG)-uptake. The 3′-deoxy-3′-[18F]fluorothymidine (FLT)-PET/CT performs better in the differential diagnosis of inflammatory changes and lung lesions with a higher specificity than FDG-PET/CT. We investigated the association between post-radiotherapy FDG-PET-parameters, FLT-PET-parameters, and outcome. Sixty-one patients suspected for having a relapse after definitive radiotherapy for lung cancer were included. All the patients had FDG-PET/CT and FLT-PET/CT. FDG-PET- and FLT-PET-parameters were collected from within the irradiated high-dose volume (HDV) and from recurrent pulmonary lesions. For associations between PET-parameters and relapse status, respectively, the overall survival was analyzed. Thirty patients had a relapse, of these, 16 patients had a relapse within the HDV. FDG-SUVmax and FLT-SUVmax were higher in relapsed HDVs compared with non-relapsed HDVs (median FDG-SUVmax: 12.8 vs. 4.2; p < 0.001; median FLT-SUVmax 3.9 vs. 2.2; p < 0.001). A relapse within HDV had higher FDG-SUVpeak (median FDG-SUVpeak: 7.1 vs. 3.5; p = 0.014) and was larger (median metabolic tumor volume (MTV50%): 2.5 vs. 0.7; 0.014) than the relapsed lesions outside of HDV. The proliferative tumor volume (PTV50%) was prognostic for the overall survival (hazard ratio: 1.07 pr cm3 [1.01–1.13]; p = 0.014) in the univariate analysis, but not in the multivariate analysis. FDG-SUVmax and FLT-SUVmax may be helpful tools for differentiating the relapse from radiation-induced changes, however, they should not be used definitively for relapse detection.

Impact of preoperative 18F-FDG PET/CT on survival of resected mono-metastatic non-small cell lung cancer

Lung Cancer ◽  
2016 ◽  
Vol 93 ◽  
pp. 28-34 ◽  
Author(s):  
Simone Tönnies ◽  
Mario Tönnies ◽  
Jens Kollmeier ◽  
Torsten T. Bauer ◽  
Gregor J. Förster ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Small Cell Lung Cancer ◽  
Cell Lung Cancer ◽  
Fdg Pet ◽  
Small Cell ◽  
Small Cell Lung ◽  
Pet Ct ◽  
18F Fdg ◽  
Fdg Pet Ct
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