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- W2897796721 abstract "Objective 18F FDG‐PET is superior to other imaging techniques in revealing residual laryngeal cancer after radiotherapy. Unfortunately, its specificity is low, due to FDG uptake in inflammation and in anaerobic conditions. PET imaging with the amino acid‐based radiopharmaceutical C11‐methionine (MET) should be less influenced by post‐radiation conditions. The aim of this study was to investigate the potential of MET in diagnosing recurrent laryngeal cancer after radiotherapy as compared to 18F‐FDG. Methods Forty‐eight patients with a clinical suspicion of local residual disease at least 3 months after completion of radiotherapy or chemoradiotherapy for a T2‐4 laryngeal carcinoma, along with an indication for direct laryngoscopy, were included. They received MET‐PET and FDG‐PET prior to the direct laryngoscopy. One senior nuclear medicine physician assessed both the FDG‐PET and MET‐PET images visually for the degree of abnormal uptake. The gold standard was a biopsy‐proven recurrence 12 months after PET. The nuclear physician had no access to the medical charts and was blinded to the results of the other PET. Sensitivity, specificity and positive and negative predictive value were calculated. Results The sensitivity of FDG was 77.3% and the specificity 56.0% after the conservative reading, with these values equalling 54.5% and 76.0% for MET. The positive predictive value of FDG was 60.7% and the negative predictive value 73.7%. The PPV of MET was 66.7%, and the NPV was 65.5%. The McNemar test within diseased (sensitivity comparison) shows a p‐value of 0.125, and the McNemar test within non‐diseased (specificity comparison) shows a P ‐value of 0.180. Conclusion MET‐PET is not superior to FDG‐PET in terms of identifying recurrent laryngeal cancer." @default.
- W2897796721 created "2018-10-26" @default.
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- W2897796721 date "2018-11-18" @default.
- W2897796721 modified "2023-09-30" @default.
- W2897796721 title "Is C-11 Methionine PET an alternative to 18-F FDG-PET for identifying recurrent laryngeal cancer after radiotherapy?" @default.
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- W2897796721 doi "https://doi.org/10.1111/coa.13242" @default.
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