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Colon carcinoma: MR imaging with CO2 enema--pilot study
D J Lomas1, R R Sood, M J Graves
1Department of Radiology, University of Cambridge and Addenbrooke's Hospital, Box 219, Hills Rd, Cambridge, CB2 2QQ, England. djl15@radiol.cam.ac.uk
Radiology
|April 27, 2001
Summary
Single-shot fast spin-echo MRI with CO2 enema effectively visualized colonic tumors in seven patients. This technique accurately predicted tumor invasion depth in over half of cases before surgery.
Area of Science:
- Medical Imaging
- Gastroenterology
- Oncology
Background:
- Colorectal cancer diagnosis requires accurate tumor staging.
- Magnetic Resonance Imaging (MRI) offers detailed anatomical visualization.
- Minimally invasive imaging techniques are crucial for pre-surgical planning.
Purpose of the Study:
- To evaluate the efficacy of breath-hold single-shot fast spin-echo MRI with CO2 enema for colonic tumor assessment.
- To compare MRI findings with surgical outcomes for accuracy in tumor depiction and invasion depth prediction.
Main Methods:
- Seven patients with known colonic tumors underwent MRI.
- A breath-hold single-shot fast spin-echo sequence was utilized.
- A carbon dioxide (CO2) enema was administered during imaging.
- MRI findings were correlated with surgical results.
Main Results:
- The MRI technique successfully demonstrated the colonic tumor in all seven patients.
- Tumor invasion through the muscularis propria was correctly predicted in four out of seven patients (57%).
- Visualization of adjacent structures and the remaining colon was adequate.
Conclusions:
- Breath-hold single-shot fast spin-echo MRI with CO2 enema is a feasible method for evaluating colonic tumors.
- The technique shows promise for pre-operative staging, particularly in assessing tumor wall invasion.
- Further studies with larger cohorts may confirm its clinical utility in colorectal cancer management.