|ECR 2019 / C-2630|
|Differentiation between clear cell renal cell carcinoma from other renal cell carcinoma subtypes: qualitative and quantitative multiphasic CT analysis|
Methods and materials
A retrospective study of patients followed on Department of Urology, University of Sao Paulo Medical School General Hospital. From January 2011 to December 2017, all patients with renal mass who underwent a partial nephrectomy with previous CT were included in this present cohort.
All examinations were performed using a multidetector CT MDCT with 64 or 128 channels (Brillance, Philips Healthcare or Aquilion CXL, Toshiba). For all patients, the abdominal scan included precontrast and postcontrast phases (corticomedullary, nephrographic and excretory phases).
CT exams were examined by a second-year resident who was blinded to clinical, pathologic, and imaging findings. Subjective and objective criteria were evaluated. The subjective analysis consisted of classifying the renal mass in the followed features: shape (well-defined x ill-defined), necrosis (present or absent), hemorrhage (present or absent), calcification (present or absent), fat component (present or absent), contrast enhancement pattern (hypovascular x hypervascular), washout (present or absent), collateral vessels into the lesion (present or absent) and collateral vessels around the lesion (present or absent). The objective criteria evaluated were the renal mass attenuation on each postcontrast phase. ROIs were placed on the most homogenous site of renal mass (and the most intense enhancement on postcontrast phases) (Figure 1).
References: Instituto de Radiologia - InRad, Universidade de São Paulo, Hospital das Clínicas - São Paulo/BR
Quantitative and qualitative analysis were compared by using the Dunnett test and Qui-Square test, respectively P < .05 was regarded as indicating statistical significance.
Thematically related posters
ECR 2019 / C-1118
The radiological investigation of upper tract transitional cell tumours – a retrospective audit.
ECR 2019 / C-1145
Pictorial Review of Potential Complications Associated with Radiofrequency Ablation of Renal masses