Application of multi-parameters magnetic resonance imaging in diagnosis of prostate cancer patients and its relationship with expression level of tissue Ki-67
10.3760/cma.j.cn115455-20190910-00663
- VernacularTitle:多参数磁共振成像在前列腺癌患者诊断中的应用及其与组织Ki-67表达水平的关系
- Author:
Degang YE
1
Author Information
1. 河北省秦皇岛市第二医院医学影像科 066600
- From:
Chinese Journal of Postgraduates of Medicine
2020;43(10):873-877
- CountryChina
- Language:Chinese
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Abstract:
Objective:To explore application of multi-parameters magnetic resonance imaging(MRI) in diagnosis of prostate cancer patients, and to analyze the relationship between various parameters and expression level of tissue Ki-67.Methods:One hundred patients suspected with prostate cancer who had underwent multi-parameters MRI before surgery from June 2018 to June 2019 in Qinhuangdao Second Hospital were enrolled. Taking preoperative needle biopsy pathology as golden standard, it was confirmed that there were 50 cases with prostate cancer and 50 cases with benign prostatic hyperplasia (BPH). Imaging features were compared between the two groups. The patients with prostate cancer underwent transrectal ultrasound guided perineal prostate biopsy. The expression of Ki-67 in prostate tissue was detected. The relationship between parameters of multi-parameters MRI and expression level of Ki-67 was analyzed.Results:The combination diagnosis of T 2WI sequence, dynamic contrast-enhanced scan and diffusion-weighted imaging showed that there were 55 positive cases and 45 negative cases. The sensitivity and specificity of combined detection for diagnosis of prostate cancer were 92.00% (46/50) and 82.00% (41/50) respectively. Compared with BPH group, ADC and Tmax level in prostate cancer group were significantly decreased: (0.67 ± 0.13) × 10 -3 mm 2/s vs. (1.28 ± 0.17) × 10 -3 mm 2/s, [(17.43 ± 2.38) s vs. (22.37 ± 3.61) s, while SImax level was significantly increased: (1.85 ± 0.21)% vs. (1.48 ± 0.17)%, P<0.05. The positive index of Ki-67 in prostate cancer patients was significantly higher than that in BPH patients: (68.15 ± 6.31)% vs. (12.64 ± 2.58)%, P<0.05. The positive expression index of Ki-67 was negatively correlated with ADC ( r=-0.516, P<0.05), while positively correlated with maximum enhancement degree ( r=0.426, P<0.05). Conclusions:Multi-parameters MRI can help distinguish prostate cancer and BPH, which is of relatively higher sensitivity and specificity for diagnosis of prostate cancer. There is certain correlation between MRI findings and Ki67, which can reflect proliferation activity of tumor cells.
