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MR imaging of ampullary carcinomas
Hiroyuki Irie1, Hiroshi Honda, Kenji Shinozaki
1Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan. irie@med.kyushu-u.ac.jp
Journal of Computer Assisted Tomography
|November 20, 2002
Summary
Magnetic Resonance Imaging (MRI) effectively detects ampullary carcinomas, with dynamic studies showing delayed enhancement characteristic of these tumors. MR cholangiopancreatography (MRCP) aids in visualizing pancreaticobiliary anatomy, potentially replacing endoscopic retrograde cholangiopancreatography (ERCP).
Area of Science:
- Radiology
- Oncology
- Gastroenterology
Background:
- Ampullary carcinomas are rare but significant tumors.
- Accurate imaging is crucial for diagnosis and management.
Purpose of the Study:
- To illustrate the MR imaging features of ampullary carcinomas.
- To evaluate the utility of dynamic MRI and MRCP in detecting and characterizing these tumors.
Main Methods:
- MR imaging was performed on 16 patients with ampullary carcinomas.
- Tumor signal intensity, enhancement patterns on dynamic study, and MRCP findings were analyzed.
- MRCP findings were compared with ERCP results.
Main Results:
- Dynamic MRI detected all but one tumor, with all detected lesions exhibiting delayed enhancement.
- MRCP identified over half of the tumors as filling defects and clearly visualized the pancreaticobiliary ducts.
Conclusions:
- Dynamic MRI is essential for diagnosing ampullary carcinoma due to high detection rates and characteristic delayed enhancement.
- MRCP offers reliable visualization of pancreaticobiliary anatomy and may serve as a substitute for diagnostic ERCP.