Pitfalls and mimickers on 18F-FDG-PET/CT in peritoneal carcinomatosis from colorectal cancer: An analysis from 37 patients - 09/11/15
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Summary |
Background |
Optimal selection is critical in patients with peritoneal carcinomatosis (PC) in whom curative cytoreductive surgery can be anticipated. 18F-FDG-PET/CT may result in false-positive findings that may eliminate patients for whom cytoreductive surgery would be beneficial.
Objectives |
To determine the rate of false-positive findings on 18F-FDG-PET/CT and clarify their causes in patients with suspected PC from colorectal cancer.
Methods |
A retrospective analysis of 37 patients with suspected PC from colorectal cancer who had 18F-FDG-PET/CT before cytoreductive surgery was performed to determine the rate and the causes of false-positive findings. 18F-FDG-PET/CT was considered falsely positive when no tumor was found at surgery, histopathological analysis and follow-up.
Results |
False-positive findings were observed in four patients, yielding a 11% (95%CI: 3–25%) false-positive rate on a per-patient basis. The causes of false-positives were elucidated in two patients (surgical mesh after umbilical hernia repair and one foreign body granuloma).
Conclusion |
False-positive findings on 18F-FDG-PET/CT are observed in 11% of patients with suspected PC from colorectal cancer. Familiarity with false-positive findings would result in more accurate selection of patients candidates to cytoreductive surgery.
Le texte complet de cet article est disponible en PDF.Keywords : 18F-FDG-PET/CT, Peritoneal carcinomatosis, False-positive findings, Imaging, Colorectal cancer, HIPEC, Hyperthermic intraperitoneal chemotherapy
Plan
Vol 152 - N° 5
P. 285-291 - novembre 2015 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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