Dr Wynnie Wai-man Lam and colleagues from Hong Kong assessed the usefulness of air-inflated magnetic resonance colonography in patients with incomplete conventional colonoscopy.
From 2001 to 2004, the investigative team identified 51 patients, of which 25 were male and 26 were female with an age range of 32 to 85 years.
The patients had incomplete colonoscopy were recruited to have magnetic resonance colonography performed.
Half-fourier single short turbo spin echo axial, and coronal were performed on the patients.
The investigators also undertook 3 dimensional fat suppressed gradient echo sequence coronal images in both the prone and supine positions.
| Magnetic resonance colonography correctly identified all 44 obstructing tumors|
|American Journal of Gastroenterology|
Magnetic resonance colonography was reviewed by 2 radiologists for detection of synchronous colonic lesion.
The team recorded the location and size of lesions and compared these with the findings of conventional colonoscopy.
Patients were managed according to the clinical situation.
The investigators compared intraoperative findings with magnetic resonance colonography findings.
Follow-up colonoscopy was performed in 29 patients.
The team then compared the follow-up colonoscopy findings with the magnetic resonance colonography findings.
The investigators identified 44 patients that had incomplete colonoscopy because of an obstructing tumor.
The other 7 patients had incomplete colonoscopy because of excessive bowel looping.
Only 1 patient suffered from chronic obstructive airway disease with resulting nondiagnostic magnetic resonance colonography.
The team successfully performed magnetic resonance colonography in all other patients.
The investigators divided each colon into 6 bowel segments for analysis.
All 300 segments were of diagnostic quality and were assessed by the magnetic resonance colonography.
The team found that magnetic resonance colonography correctly identified all 44 obstructing tumors demonstrated by initial conventional colonoscopy.
The investigators observed that synchronous tumors in proximal colonic segments were identified in 2 patients by magnetic resonance colonography.
Magnetic resonance colonography identified 2 colonic tumors located in bowel segments inaccessible by colonoscopy because of excessive looping.
Dr Wai-man Lam's team concludes, “Magnetic resonance colonography is useful for detection of colonic pathology and assessment of proximal colon in patients with colonic cancer after incomplete colonoscopy.”