Atypical CT and MRI findings of renal cell carcinoma / 中华泌尿外科杂志

ABSTRACT

Objective To analyze the atypical CT and MRI findings of renal cell carcinoma (RCC) and to discuss how to improve the diagnostic accuracy of RCC using CT and MRI. Methods The data of 100 cases of RCC (71 males and 29 females;age range from 29 to 75 years with a mean of 55 years) were reviewed.The surgical and pathological findings showed clear cell carcinoma in 82 cases,mixed cell carcinoma in 8,granular cell carcinoma in 5,papillary RCC in 4 and sarcomatoid RCC in 1.A total of 101 masses were found.The masses were 0.8 to 9.0 cm (mean,4.3 cm) in greatest dimension. According to the CT and MRI findings of most cases in this group and the relevant information in literature,the typical CT and MRI findings of RCC were summarized. The atypical CT and MRI findings of RCC were analyzed,and correlated with surgical and pathological findings. Results There were 17 cases presenting with atypical CT and MRI findings.The atypical CT and MRI findings of RCC were divided into 4 types① hypovascular RCC (12 cases,including 3 of clear cell carcinoma, 1 of mixed cell carcinoma, 5 of granular cell carcinoma and 3 of papillary RCC);②cystic RCC (3 cases of clear cell carcinoma);③RCC with volumes of hemorrhage (1 case of papillary RCC);④tumor's diameter less than 1㎝ (1 case of clear cell carcinoma). Conclusions Correct evaluation of the CT/MRI findings of hypovascular and cystic RCC,application of adequate scanning methods and careful interpretation of the imaging films are helpful for improving diagnostic accuracy of RCC.