Magnetic resonance imaging (MRI) versus computed tomography (CT) for the diagnosis of lymph node metastasis in preoperative rectal cancer

2012 ◽  
Author(s):  
Ying-Shi Sun ◽  
Xiao-Ting Li ◽  
Lei Tang ◽  
Xiao-Yan Zhang ◽  
Xiao-Peng Zhang ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Rectal Cancer ◽  
Lymph Node ◽  
Magnetic Resonance ◽  
Lymph Node Metastasis ◽  
Resonance Imaging ◽  
Node Metastasis ◽  
Magnetic Resonance Imaging Mri

Cộng hưởng từ chẩn đoán ung thư vòm mũi họng di căn hạch hầu sau

2020 ◽  
Author(s):  
Tuong Pham Nguyen
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Lymph Node ◽  
Magnetic Resonance ◽  
Nasopharyngeal Carcinoma ◽  
Lymph Node Metastasis ◽  
Lymph Nodes ◽  
Resonance Imaging ◽  
Retropharyngeal Lymph Node ◽  
Node Metastasis

Purpose: Survey the rate and distribution of retropharyngeal lymph node metastasis, the suitability between Magnetic Resonance and computed tomography in the evaluation of nasopharyngeal tumor and the ability to detect retropharyngeal lymph node. Methods and Materials: Cross-sectional descriptive study conducted on 35 patients with nasopharyngeal carcinoma diagnosed and treated at Hue Central Hospital from April 2018 to July 2019. The patient underwent Magnetic Resonance Imaging and Computed Tomography. Data processed with SPSS 20.0 for Windows. Investigate the level of correlation between the two techniques based on the Kappa coefficient. Results: 14 patients had retropharyngeal lymph node metastasis with a total of 25 lymph nodes, all of which in the lateral position, none in the middle. 76% the lymph nodes are at the level of C1 vertebra. 48% of lymph nodes have heterogeneous enhancement. There is a close match between Magnetic Resonance Imaging and Computed Tomography in assessing the invasion at anatomical positions: Rosenmuller fossa, Eustachian tubes, nasal cavity, pharynx, and paranasal sinuses; There is a moderate match between the two methods in assessing the invasion of the cranial base and the sphenomaxillary suture. In 14/35 cases where the retropharyngeal lymph node was detected on Magnetic Resonance Imaging (accounting for 40%), Computed Tomography identified only 6 cases (17.1%). Conclusions: There are differences on many levels between Magnetic Resonance Imaging and Computed Tomography in the diagnosis of tumor invasion and retropharyngeal lymph node metastasis in nasopharyngeal carcinoma. In particular, Magnetic Resonance Imaging is better in detecting retropharyngeal lymph node metastasis due to high structural contrast, these lymph nodes are often difficult to detect on Computed Tomography because it is difficult to distinguish from posterior pharyngeal structures or tumors.

ROLE OF MAGNETIC RESONANCE IMAGING IN LOCAL STAGING AND DETECTING LYMPH NODE METASTASIS IN RECTAL CANCER

2019 ◽  
pp. 101-105
Author(s):  
Tran Ngoc Trinh Nguyen ◽  
Thanh Thao Nguyen
Keyword(s):  
Magnetic Resonance Imaging ◽  
Rectal Cancer ◽  
Lymph Node ◽  
Magnetic Resonance ◽  
Lymph Node Metastasis ◽  
Resonance Imaging ◽  
Node Metastasis ◽  
Common Location ◽  
Local Staging

Objectives: To evaluate the role of MRI in local staging and detecting lymph node metastasis in rectal cancer. Material and Methods: A cross sectional study with 32 histiologically proven rectal cancer patients treated at Hue Central Hospital from 01/2018 to 01/2019. Results: Middle rectum was the most common location (53.1%). The accuracy of MRI in local staging was 81.3%, in patients without previous radiotherapy was 82.6%, in patiens with previous radiotherapy was 77.8%. The sensitivity in staging of stage T2, T3, T4 was 76.9%, 93.8%, 33.3%, respectively. The specificity in staging satge T2, T3, T4 was 94.7%, 68.8%, 100%, respectively. The accuracy, sensitivity and specificity of MRI in dectecting lymph node metastasis was 81.3%, 57.1% and 88.8%, respectively. Conclusion: Magnetic resonance imaging is an accurate tool for the local staging of rectal cancer with high accuracy, the sensitivity, specificity. For dectecting lymph node metastasis, MRI has high specificity but low sensitivity. Key words: MRi, rectal cancer, lymph node metastasis

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