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Small bowel neoplastic disease: demonstration by MRI
R C Semelka1, G John, N L Kelekis
1Department of Radiology--CB 7510, University of North Carolina, Chapel Hill 27955-7510, USA.
Journal of Magnetic Resonance Imaging : JMRI
|November 1, 1996
Summary
Magnetic resonance imaging (MRI) effectively detects small bowel tumors. Gadolinium-enhanced, fat-suppressed MRI sequences reliably show tumor extent and characteristics, aiding diagnosis.
Area of Science:
- Radiology
- Gastroenterology
- Oncology
Background:
- Small bowel tumors are rare but can present as primary or metastatic disease.
- Accurate imaging is crucial for diagnosis and management.
Purpose of the Study:
- To evaluate the effectiveness of Magnetic Resonance Imaging (MRI) in demonstrating small bowel tumors.
- To identify optimal MRI sequences for visualizing tumor characteristics and extent.
Main Methods:
- Retrospective analysis of 16 patients with histopathologically confirmed small bowel tumors.
- MRI protocols included breath-hold T1-weighted spoiled gradient echo, immediate postgadolinium spoiled gradient echo, and delayed T1-weighted fat-suppressed images.
Main Results:
- Small bowel tumors were demonstrable on MRI, with sizes ranging from 1 to 9 cm (mean 4.0 cm).
- Malignant tumors typically showed heterogeneous enhancement after gadolinium administration.
- Precontrast and postgadolinium fat-suppressed T1-weighted images were most reliable for assessing tumor local extent.
Conclusions:
- MRI is a valuable tool for detecting and characterizing small bowel tumors.
- Specific MRI sequences, particularly gadolinium-enhanced fat-suppressed images, enhance visualization of tumor extent and features.