The Value of the Corticomedullary Phase Scan for the Differentiation of the Subtypes of Renal Cell Carcinoma / 实用放射学杂志

ABSTRACT

Objective To evaluate the value of the corticomedullary phase ( CMP ) of CT and MRI scan for the differentiation of the subtypes of renal cell carcinoma ( RCC ) .Methods Ninety six cases of RCC proved by surgery and pathology were performed CMP scan with multislice helical CT and/or 1.5T MRI . The enhancement patterns of CT/MRI were correlated with the subtypes of RCC.Results There were 1 case of sarcomatoid RCC , 78 cases of clear cell RCC , 5 cases of granular cell RCC , 8 cases of mixed cell RCC and 4 case of papillary RCC . The masses were 2 cm to 9 cm in diameter . Sarcomatoid RCC, mixed cell RCC , 97.4% ( 76/78 ) of clear cell RCC and 75.0%(3/4) of papillary RCC showed inhomogenous enhancdment, and granular cell RCC showed homogenous enhancdment. Comparing with renal cortex, 51.3%(40/78) of clear cell RCC and 37.5%(3/8) mixed cell RCC showed hyperdensity or hypertension, sarcomatoid RCC, 44.9%(35/78) of clear cell RCC and 50.0%(4/8) mixed cell RCC showed isodensity or isotension, and all the granular cell RCC and papillary RCC showed hypodensity or hypotension.Conclusion The enhancement pattern in CMP of CT and MRI scan is different among the subtypes of RCC, and could be used for differentiation.