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Differentiating malignant from benign common bile duct stricture with multiphasic helical CT.
Seung Hong Choi1, Joon Koo Han, Jeong Min Lee
1Department of Radiology and Institute of Radiation Medicine, Seoul National University College of Medicine, Clinical Research Institute, Seoul National University Hospital, 28 Yongon-dong, Chongno-gu, Seoul 110-744, Korea.
Radiology
|June 16, 2005
Summary
Multiphasic helical computed tomography (CT) can differentiate malignant and benign common bile duct (CBD) strictures. Hyperenhancement of the CBD during the portal venous phase is the key predictor for malignancy.
Area of Science:
- Radiology
- Gastroenterology
- Oncology
Background:
- Common bile duct (CBD) strictures can be malignant or benign, requiring accurate differentiation for appropriate patient management.
- Distinguishing between malignant and benign CBD strictures is crucial for treatment planning and prognosis.
Purpose of the Study:
- To retrospectively evaluate multiphasic helical computed tomography (CT) for differentiating focal malignant from benign common bile duct (CBD) strictures.
- To identify imaging predictors of malignancy in focal CBD strictures using CT.
Main Methods:
- A retrospective analysis of 50 patients with focal CBD strictures (32 malignant, 18 benign) was performed.
- Multiphasic CT findings, including wall thickness, length, CBD diameter, and enhancement patterns, were analyzed.
- Univariate and multivariable logistic regression analyses were used to compare CT features and identify predictors.
Main Results:
- Malignant strictures were significantly longer and associated with larger upstream CBD diameters compared to benign strictures.
- Thicker involved CBD wall (>1.5 mm) and hyperenhancement during hepatic arterial and portal venous phases were more frequent in malignant cases.
- Multivariable analysis identified hyperenhancement of the involved CBD during the portal venous phase as the sole independent predictor differentiating malignant from benign strictures.
Conclusions:
- Hyperenhancement of the involved common bile duct (CBD) during the portal venous phase on multiphasic CT is a significant differentiator between malignant and benign strictures.
- This CT finding can aid in the accurate diagnosis of malignant CBD strictures.