Fibrous Meningioma with Ring Enhancement in Cerebellopontine Angle Region:Report of One Case / 中国医学科学院学报

Fibrous meningioma is a common subtype of meningioma. Contrast-enhanced scan typically shows evident homogeneous enhancement,while ring enhancement has not been described. In this article,we report a case of fibrous meningioma with ring enhancement in cerebellopontine angle region.

Value of Magnetic Resonance Imaging Texture Analysis in the Differential Diagnosis of Benign and Malignant Breast Tumors / 中国医学科学杂志(英文版)

Objective To investigate the difference in texture features on diffusion weighted imaging (DWI) images between breast benign and malignant tumors.Methods Patients including 56 with mass-like breast cancer, 16 with breast fibroadenoma, and 4 with intraductal papilloma of breast treated in the Hainan Hospital of Chinese PLA General Hospital were retrospectively enrolled in this study, and allocated to the benign group (20 patients) and the malignant group (56 patients) according to the post-surgically pathological results. Texture analysis was performed on axial DWI images, and five characteristic parameters including Angular Second Moment (ASM), Contrast, Correlation, Inverse Difference Moment (IDM), and Entropy were calculated. Independent sample t-test and Mann-Whitney U test were performed for intergroup comparison. Regression model was established by using Binary Logistic regression analysis, and receiver operating characteristic curve (ROC) analysis was carried out to evaluate the diagnostic efficiency.Results The texture features ASM, Contrast, Correlation and Entropy showed significant differences between the benign and malignant breast tumor groups (P=0.014, P=0.019, P=0.010, P=0.007). The area under the ROC curve was 0.685, 0.681, 0.754, and 0.683 respectively for the positive texture variables mentioned above, and that for the combined variables (ASM, Contrast, and Entropy) was 0.802 in the model of Logistic regression. Binary Logistic regression analysis demonstrated that ASM, Contrast and Entropy were considered as the specific imaging variables for the differential diagnosis of breast benign and malignant tumors.Conclusions The texture analysis of DWI may be a simple and effective tool in the differential diagnosis between breast benign and malignant tumors.

Epidermoid Cyst in the Fourth Ventricle:Report of One Case / 中国医学科学院学报

We reported a case with epidermoid cyst (EC) in the fourth ventricle. The insinuation and scalloping growth pattern were the distinctive imaging characteristics of EC in the fourth ventricle on magnetic resonance imaging. The accurate identification of the punctate enhancement of vessels around the lesion may be helpful for its differential diagnosis from hemangioblastoma.

Diagnostric Value of Contrast-enhanced T2 Fluid-attenuated Inversion Recovery Imaging for Splenic Hemangioma:A Case Report / 中国医学科学院学报

The diagnostic criteria of splenic hemangioma is the delayed filling enhancement pattern on the dynamic contrast CT imaging or magnetic resonance (MR) T1-weighted image,which requires long examination time and thus decreases the MR scanning efficiency. Contrast-enhanced T2 fluid-attenuated inversion recovery (FLAIR) imaging is a new MR imaging technique that can be used to evaluate the intrinsic characteristics of hemangioma. However,few literature has discribed its role in diagnosing splenic hemangioma. In this article we reported one case of splenic hemangioma diagnosed by contrast-enhanced T2 FLAIR imaging,which reduced the MR scanning time and provided valuable experience for the diagnosis of splenic hemangioma.