Diagnosis and staging of renal cell carcinoma: a comparison of MR imaging and CT

Renal Angiomyolipoma Composed Primarily of Smooth Muscle Element: Diagnostic Considerations

“…On the other hand, renal cell carcinomas were reported to have a varied MR signal, with the most com mon appearance being a mass with an intensity interme diate between that of the renal cortex and medulla on Tlweighted images and hyperintense on T2-weighted images [10]. The findings of a similar intensity to the renal parenchyma on Tl-weighted images and a hypointensity on T2-weighted images in the present case are dif ferent from those of the MR imaging of usual angiomyolipoma and renal cell carcinoma.…”

Incidentally Detected Renal Cell Carcinoma in Patients with Other Cancers

“…CT is very accurate in diagnosing renal cell carcinoma [ 1,13] and extremely sensitive in dif ferentiating primary from secondary renal tumors [14], Renal metastases are ususally small, multiple, bilateral, wedge-shaped, less exophytic, and located within the renal capsule. In contrast, renal cell carcinoma is usually single, unilateral, nonwedge-shaped, exophytic, and easily transgresses the renal capsule [14], MRI is indicated only when the CT findings are equivocal [15]. Although renal metastases from breast cancer are well known [16], the renal lesion in one of our cases (case 1) was diagnosed to be a malignant tumor on CT and MRI.…”

Color Duplex Sonography vs. Computed Tomography: Accuracy in the Preoperative Evaluation of Renal Cell Carcinoma

“…In comparison with CT scan, MR imaging provides equivalent results for T1 and T2 tumors and also for regional lymph nodes and distant metastases in advanced renal tumors. MR imaging seems to be more accurate than CT scan in the staging of tumors with venous tumor thrombus (stage T3b/T3c) and in tumor invasion of adjacent organs outside the Gerota’s fascia (stage T4) [15]and clearly depicts venous invasion without the use of intravenous contrast medium and also distinguishes between lymph nodes and small vascular structures [16]. The accuracy of MR imaging is reported to be 62–81% in the evaluation of local tumor involvement, 85–90% for lymphadenopathy, 89– 95% for renal vein thrombosis and 100% for inferior vena cava thrombosis [17, 18].…”