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Published on: March 8, 2013
Role of perfusion magnetic resonance imaging in cervical lymphadenopathy
Ahmed Abdel Khalek Abdel Razek1, Gada Gaballa
1Department of Diagnostic Radiology, Faculty of Medicine, Mansoura University, Mansoura, Egypt. arazek@mans.edu.eg
Insights
Perfusion MR imaging effectively differentiates malignant from benign cervical lymph nodes. This technique aids in characterizing lymphadenopathy by analyzing dynamic susceptibility contrast percentages.
Area of Science:
- Radiology
- Oncology
- Medical Imaging
Background:
- Cervical lymphadenopathy diagnosis can be challenging.
- Accurate characterization of lymph nodes is crucial for treatment planning.
Purpose of the Study:
- To evaluate the utility of perfusion magnetic resonance (MR) imaging in differentiating cervical lymphadenopathy.
- To assess the role of dynamic susceptibility contrast (DSC) percentage in characterizing lymph nodes.
Main Methods:
- Dynamic susceptibility-weighted contrast-enhanced perfusion MR imaging was performed on 45 cervical lymph nodes.
- Time signal intensity curves were analyzed to calculate DSC percentage.
- Receiver operating characteristic curve analysis was employed to determine diagnostic performance.
Main Results:
- Malignant lymph nodes showed a significantly higher mean DSC percentage (44.8%) compared to benign nodes (28.8%) (P = 0.001).
- Metastatic nodes (48.72%) were significantly different from lymphoma (37.09%) (P = 0.001).
- DSC percentage thresholds of 34.3% and 43.5% demonstrated high accuracy in differentiating malignant/benign and metastatic/lymphomatous nodes, respectively (AUCs 0.95-0.97).
Conclusions:
- Perfusion MR imaging is a promising noninvasive tool for distinguishing malignant from benign cervical lymph nodes.
- This imaging technique aids in the characterization of malignant cervical lymphadenopathy, supporting clinical decision-making.
Purpose:
To assess the role of perfusion magnetic resonance (MR) imaging in patients with cervical lymphadenopathy.
Materials And Methods:
Dynamic susceptibility-weighted contrast-enhanced perfusion MR imaging was performed on 45 cervical lymph nodes after a bolus injection of gadolinium-DTPA (0.1 mmol/kg body weight). Time signal intensity curve was created and dynamic susceptibility contrast (DSC) percentage of the lymph nodes was calculated. Receiver operating characteristic curve analysis was used to investigate whether DSC percentage could aid in the characterization of cervical lymphadenopathy.
Results:
The mean (SD) DSC percentage of malignant nodes (44.8% [6.2%]) was significantly different (P = 0.001) from that of benign nodes (28.8% [4.8%]). The mean (SD) DSC percentage of metastatic nodes (48.72% [2.4%]) was significantly different (P = 0.001) than that of lymphoma (37.09% [3.5%]). The DSC percentage threshold value used for differentiating malignant from benign nodes and metastatic from lymphomatous nodes were 34.3% and 43.5%, with areas under the curve of 0.95 and 0.97, respectively.
Conclusions:
Perfusion MR imaging is a noninvasive promising method that can be used for differentiation of malignant from benign cervical lymph nodes, and it helps in the characterization of malignant cervical lymphadenopathy.
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