The investigation of choice to evaluate IVC & Renal Vein thrombosis in Renal Cell Ca is :

Ans. is 'c' i.e. CT scan Diagnosis of Renal Vein & IVC thrombosisVenography (Inferior vena cavogram & selective renal venography) is the most reliable and definitive diagnostic investigation for establishing the presence of thrombus. However its invasive and rarely used now a days.MRI - is the best non-invasive imaging modality for IVC and renal vein thrombosis.CT - is next best to MRI, with sensitivity and specificity as high as 92% and 100% (Ref: Grainger, 7/e, p 1523) Sutton writes - "MR and CT are both highly accurate in the demonstration of venous invasion."Doppler - is able to detect the venous thrombosis as echogenic material in the venous lumen and absence of flow. But it has got its limitations and is thus inferior to CT & MR.Also rememberCT is the imaging modality of choice for diagnosing and staging renal cells ca.