Imaging of renal cell carcinoma 10 Imaging plays an important part in the detection,characterization and staging of renal cell cancer Imaging plays an important role in renal cancer treatment decision It has been shown that in the presence of a CT-confirmed renal mass. detection by IVU is only 21%when the lesion is smaller than 2 cm,52%when the lesion is 2~3 cm,and 85%when the lesion is 3 cm or more in diameter. Lesion detection on contrast-enhanced MRI (90~97%)equals that of CT (89-99%) 5 CT manifestation ill-defined solid lesion on plain scan alter renal contour or intrarenal architecture when large enough heterogeneous enhancement is characteristic intratumoral haemorrhage or necrosis or calcification ●Metastasis MR manifestation 10 signal intensity can be heterogeneous on both TIWI and T2WI. ●Low signal on TIWI Heterogeneous high signal on T2WI heterogeneous enhancement Carcinoma of urinary bladder 5 IVU:filling defect in bladder (space-occupying lesion irregular shape:cauliflower CT findings 5 Irregular mass arise from the wall of bladder ●Soft tissue density Heterogeneous enhancement ●necrosisImaging of renal cell carcinoma ⚫ Imaging plays an important part in the detection, characterization and staging of renal cell cancer ⚫ Imaging plays an important role in renal cancer treatment decision ⚫ It has been shown that in the presence of a CT-confirmed renal mass, detection by IVU is only 21% when the lesion is smaller than 2 cm, 52% when the lesion is 2~3 cm, and 85% when the lesion is 3 cm or more in diameter. ⚫ Lesion detection on contrast-enhanced MRI (90~97%) equals that of CT (89~99%) CT manifestation ⚫ ill-defined solid lesion on plain scan ⚫ alter renal contour or intrarenal architecture when large enough ⚫ heterogeneous enhancement is characteristic ⚫ intratumoral haemorrhage or necrosis or calcification ⚫ Metastasis MR manifestation ⚫ signal intensity can be heterogeneous on both T1WI and T2WI. ⚫ Low signal on T1WI ⚫ Heterogeneous high signal on T2WI ⚫ heterogeneous enhancement Carcinoma of urinary bladder ⚫ IVU：filling defect in bladder（space-occupying lesion ） ⚫ irregular shape：cauliflower CT findings ⚫ Irregular mass arise from the wall of bladder ⚫ Soft tissue density ⚫ Heterogeneous enhancement ⚫ necrosis 10’ 5’ 10’ 5’ 5’