1. Early prediction of pathological response in locally advanced rectal cancer based on sequential F-18-FDG PET
- Author
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Mathieu Hatt, Ruud G.P.M. van Stiphout, Adrien Le Pogam, Guido Lammering, Dimitris Visvikis, Philippe Lambin, Optimisation Continue des Actions Thérapeutiques par l'Intégration d'Informations Multimodales, Université de Brest (UBO)-Télécom Bretagne-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre Hospitalier Régional Universitaire de Brest (CHRU Brest), MAASTRO clinic, Maastro Lab, Hatt, Mathieu, Radiotherapie, Beeldvorming, and RS: GROW - School for Oncology and Reproduction
- Subjects
Adult ,Male ,medicine.medical_specialty ,Time Factors ,Colorectal cancer ,Partial volume ,[SDV.CAN]Life Sciences [q-bio]/Cancer ,Sensitivity and Specificity ,Article ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,0302 clinical medicine ,Text mining ,[SDV.CAN] Life Sciences [q-bio]/Cancer ,Fluorodeoxyglucose F18 ,Predictive Value of Tests ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Aged ,Retrospective Studies ,Aged, 80 and over ,medicine.diagnostic_test ,Rectal Neoplasms ,business.industry ,Retrospective cohort study ,Chemoradiotherapy ,Hematology ,General Medicine ,Middle Aged ,Prognosis ,medicine.disease ,Combined Modality Therapy ,3. Good health ,Treatment Outcome ,ROC Curve ,Oncology ,Positron emission tomography ,Positron-Emission Tomography ,030220 oncology & carcinogenesis ,Predictive value of tests ,Preoperative Period ,Disease Progression ,Female ,Histopathology ,Nuclear medicine ,business - Abstract
International audience; Background. The objectives of this study were to investigate the predictive value of sequential (18)F-FDG PET scans for pathological tumor response grade (TRG) after preoperative chemoradiotherapy (PCRT) in locally advanced rectal cancer (LARC) and the impact of partial volume effects correction (PVC). Methods. Twenty-eight LARC patients were included. Responders and non-responders status were determined in histopathology. PET indices [SUV max and mean, volume and total lesion glycolysis (TLG)] at baseline and their evolution after one and two weeks of PCRT were extracted by delineation of the PET images, with or without PVC. Their predictive value was investigated using Mann-Whitney-U tests and ROC analysis. Results. Within baseline parameters, only SUV(mean) was correlated with response. No evolution after one week was predictive of the response, whereas after two weeks all the parameters except volume were, the best prediction being obtained with TLG (AUC 0.79, sensitivity 63%, specificity 92%). PVC had no significant impact on these results. Conclusion. Several PET indices at baseline and their evolution after two weeks of PCRT are good predictors of response in LARC, with or without PVC, whereas results after one week are suboptimal. Best predictor was TLG reduction after two weeks, although baseline SUV(mean) had smaller but similar predictive power.
- Published
- 2013