PET/CT better than whole-body MRI for colon cancer analysis | MRI
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MRI PET/CT better than whole-body MRI for colon cancer analysis

PET/CT better than whole-body MRI for colon cancer analysis

Radiology News
Whole-body MRI is a good method for assessing colon cancer, but PET/CT performs better. Whole-body MRI is a good method for assessing colon cancer, but PET/CT performs better. That's the conclusion of a study presented on 10 March at the European Congress of Radiology (ECR).

To assess the accuracy of whole-body MRI (WBMR) in comparison with whole-body PET/CT (WBPET), 20 consecutive patients with previously diagnosed colon cancer underwent both scannings for staging of lymphnode (N) and distant metastases (M) after resection of the primary tumor.

The MR images were evaluated by two radiologists while the PET/CT images were read by one radiologist and one nuclear physician. Histology and a mean clinical follow-up of 12 months served as the standards of reference.

"WBMR is an effective and fast method for examining colon cancer patients, but cannot reach accuracy of PET/CT", concluded the authors of the study, from the University of Rome.

Regional lymphnode involvement was correctly determined in 15/20 cases as N-positive for both modalities (75 per cent) while overall M stage was diagnosed correctly in 14/20 (70 per cent) patients for WBMR in comparison with 18/20 (90 pe cent) in PET/CT. N-stage was overstaged with WBMR in 2 patients (10 per cent) and with PET/CT in no patients and understaged in 3 patients with WBMR and in no patients with PET-CT.

Distant metastases were overstaged with PET/CT in 2 and understaged in 3 patients with WBMR in 3 and 7 patients, respectively.
 

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