Imageological Study of Benign and Malignant Renal Tumors
Objective To compare and contrast the baseline characteristics of patients with different types of renal tumors,and also to compare the consistency of three imaging methods:magnetic resonance imaging(MRI),CT,and Doppler ultrasound for the presence or absence of renal tumors and their ability to diagnose benign and malignant properties.Methods One hundred and eighteen patients with renal tumors who underwent MRI examination from February 2021 to January 2022 at the Third Medical Center of the PLA General Hospital were retrospectively collected,and some patients underwent both CT and Doppler ultrasound examination upon admission.The t-test was used for comparison between groups for measures that satisfied normality;the Mann-Whitney U rank sum test was used for comparison between groups for measures that did not satisfy normal distribution.The chi-square test or Fisher's exact probability method was used for comparison between groups of statistical data,and the Kappa test was used to test the consistency of MRI,CT and Doppler ultrasound findings.Results Among the 118 study subjects who underwent MRI,64 patients(54.24％)had benign renal tumors,117 patients(99.15％)had malignant renal tumors,and 63 patients(53.85％)had both benign and malignant renal tumors.The proportion of male patients with both benign and malignant renal tumors(49 cases,77.78％)was significantly higher than that of patients with only benign or only malignant renal tumors(32 cases,58.18％),and the difference was statistically significant(x2=5.239,P=0.021).The median age of patients with both benign and malignant renal tumors(59 years;interquartile spacing:52-65 years)was significantly higher than that of patients with benign only or malignant only renal tumors(50 years;interquartile spacing:43-58 years),with a statistically significant difference.27 patients studied had all three types of examinations,MRI,CT and Doppler ultrasound,and all patients were diagnosed with renal tumors in MRI method examination patients,26 were diagnosed with renal tumors in CT examinations and 24 were diagnosed with renal tumors in ultrasound examinations,and the agreement between CT examinations and MRI examinations was poor(kappa=0.04;95％CI,-0.11 to 0.48);the agreement between ultrasound and MRI examinations was poor(kappa=0.11;95％CI,-0.01 to 0.23);There were 15 patients diagnosed with benign renal tumor in MRI and 1 patient diagnosed with benign renal tumor in CT and the agreement between them was poor(kappa=0.09;95％CI,-0.08～0.26),2 patients with benign renal tumor in ultrasound,and 12 patients with benign and malignant could not be interpreted.Conclusion Men and older people are more likely to have malignant renal tumors.MRI examination is superior to CT examination and ultrasonography in the diagnosis and determination of benign and malignant in patients with renal cancer,and can make up for the shortcomings of CT examination and ultrasonography.In clinical practice,MRI can provide a certain reference basis for the diagnosis of tumors and the formulation of treatment plans,and has a high clinical application and promotion value.
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