RESUMO
Objective To identify the diagnostic value of ADC combined with DWI in benign lesions and malignant lesions of testis. Methods 35 patients with testicular lesions confirmed by operation and pathological examination in our hospital were analyzed retrospectively, including 18 benign lesions and 17 malignant lesions.The mean ADC values of normal tissue and parenchyma of testicular lesions were measured and statistically analyzed by K ruskal-W allis test,and receiver operating characteristic(ROC)curve was delineated. The optimum ADC value for differential diagnosis of malignant testicular lesions was analyzed and determined.Results In 33 cases of normal testicular tissue DWI showed homogeneous high signal,and mean ADC was(1.137 ± 0.119)×10-3mm2/s.18 cases of benign lesions mostly showed unrestricted diffusion,and mean ADC was(1.104 ± 0.463)×10-3mm2/s.In 17 cases of malignant lesions DWI showed high signal,and mean ADC was(0.778 ± 0.198)×10-3mm2/s.The comparison of ADC mean values between malignant testicular lesions and normal tissue as well as benign lesions of testis showed significant difference(P<0.05).The optimum ADC to distinguish malignant testicular lesions from benign testicular lesions was 0.911×10 -3mm2/s(82.4% sensitivity and 82.4% specificity). Conclusion DWI combined with ADC value is beneficial to the preoperative diagnosis and differential diagnosis between malignant testicular lesions and benign lesions of testis.