MRI differential diagnosis of benign or malignant Bosniak III renal cystic lesions
10.13929/j.1003-3289.201901157
- Author:
Ling ZHOU
1
Author Information
1. Department of Radiology, The Affiliated Hospital of Hubei Universityof Arts and Science, Xiangyang Central Hospital
- Publication Type:Journal Article
- Keywords:
Diagnosis, differential;
Kidney neoplasms;
Magnetic resonance imaging
- From:
Chinese Journal of Medical Imaging Technology
2019;35(11):1693-1697
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To investigate the value of MRI depicting intracystic small nodules (>3 mm) in differential diagnosis of benign or malignant Bosniak III renal cystic lesions. Methods: Clinical data of 48 patients with Bosniak III renal cystic lesions were analyzed retrospectively. According to MRI displaying >3 mm nodules inside or not, the lesions were divided into intracystic nodular and non-intracystic nodular types. The malignant rate, the maximum diameter, inhomogeneous signal of T2WI and/or T1WI and restricted diffusion of DWI were recorded and compared between the two types. Results: There were 58 lesions in 48 cases of Bosniak III cystic lesions, among them 33 cases were found with non-intracystic nodular lesions (5 was malignant [5/33, 15.15%]) and 25 with intracystic nodular lesions (17 was malignant [17/25, 68.00%]). The malignant rate of intracystic nodular lesions was higher than that of non-intracystic nodular lesions (χ2=16.847, P<0.001). The mean diameter of intracystic nodular lesions was 49.20 mm, and 51.00 mm in the non-intracystic nodular lesions (P>0.05). The inhomogeneous signal intensity of T2WI and/or T1WI were observed in 12 (12/33, 36.36%) of non-intracystic nodular lesions and 15 (15/25, 60.00%)of intracystic nodular lesions (P>0.05). In the non-intracystic nodular lesions and intracystic nodular lesions, 4 (4/8, 50.00%) and 10 (10/11, 90.91%) showed high signal intensity on the DWI images respectively (P<0.05). Conclusion: Renal cystic lesions with intracystic nodule (>3 mm) has a higher risk of malignancy, and DWI has a certain significance for the differentiation of benign and malignant lesions.
