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Diagnostic value of whole-body MRI with diffusion-weighted sequence for detection of peritoneal metastases in colorectal malignancy

OBJECTIVE: To assess the diagnostic accuracy of whole-body MRI using diffusion-weighted sequence (WB-DWI) to determine the peritoneal cancer index (PCI) in correlation with surgical and histopathological findings. METHODS: Twenty-seven patients underwent preoperative WB-MRI, followed by cytoreductiv...

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Detalles Bibliográficos
Autores principales: Zhang, Huan, Dai, Weixing, Fu, Caixia, Yan, Xu, Stemmer, Alto, Tong, Tong, Cai, Guoxiang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Chinese Anti-Cancer Association 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5994551/
https://www.ncbi.nlm.nih.gov/pubmed/29951340
http://dx.doi.org/10.20892/j.issn.2095-3941.2017.0162
Descripción
Sumario:OBJECTIVE: To assess the diagnostic accuracy of whole-body MRI using diffusion-weighted sequence (WB-DWI) to determine the peritoneal cancer index (PCI) in correlation with surgical and histopathological findings. METHODS: Twenty-seven patients underwent preoperative WB-MRI, followed by cytoreductive surgery for primary tumors of the appendix (n = 15), colorectum (n = 12), and associated peritoneal disease. A total of 351 regions were retrospectively reviewed. The sensitivity, specificity, and accuracy were calculated at 13 anatomical sites. The WB-DWI PCI and PCI type were compared with surgical and histopathological findings. RESULTS: No statistical difference was found between the WB-DWI PCI and surgical PCI (P = 0.574). WB-DWI correctly predicted the PCI type in 24 of 27 patients with high accuracy (88.9%), including 10 of 10 patients with small-volume tumor, 12 of 14 with moderate-volume tumor, and 2 of 3 with large-volume tumor. WB-DWI correctly depicted tumors in 163 of 203 regions, with 40 false-negative and 23 false-positive regions. The overall sensitivity, specificity, and accuracy of WB-DWI for the detection of peritoneal tumors were 80.3%, 84.5%, and 82.1%, respectively. For lesions < 0.5 cm in diameter, WB-DWI demonstrated good sensitivity (69.4%). CONCLUSIONS: WB-DWI accurately predicted PCI before surgery in patients undergoing evaluation for cytoreductive surgery.