[The staging of renal-cell carcinomas in MRT and CT--a prospective histologically controlled study].
OBJECTIVE
To evaluate the accuracy of computed tomography (CT) and magnetic resonance imaging (MRI) in staging renal carcinoma.


METHODS
33 renal carcinomas were preoperatively examined for tumour staging by CT and MR imaging and correlated with histopathological staging. CT imaging was performed at first as a non-contrast scan. Finally incremental images (10 mm) after intravenous contrast injection were obtained. In MR imaging we performed a transversal T1-weighted GE sequence (112/5) with and without GDTPA, a transversal fat-suppressed double-echo sequence (3900/22/90), a coronal T1-weighted GE sequence with and without GDTPA and a coronal T2-weighted TSE sequence (2800/128). In addition, dynamic T1-weighted GE imaging after GDTPA injection as well as TOF angiography in coronal direction were performed. Finally CT and MRI findings were correlated with surgical and histopathological staging results.


RESULTS
CT and MRI staging was correct in 27 and 28 of 33 tumours. Sensitivity and specificity for tumour stage T3b to T4 was for MRI and CT 88.9% and 95.8%. With MRI 4 out of 7 thrombi were correctly diagnosed with high accuracy, but via CT none.


CONCLUSIONS
In early stage renal carcinoma CT and MR imaging yielded similar staging accuracies. In advanced renal carcinoma MRI was superior to CT imaging, especially in diagnosing tumour thrombus. Consequently the extent of tumour thrombus may be assessed by MRI which may therefore replace conventional cavography.
Hallscheidt
P
P
Abteilung Radiodiagnostik, Radiologische Klinik, Ruprecht-Karls-Universität Heidelberg.
Stolte
E
E
Roeren
T
T
Pomer
S
S
Drehmer
I
I
Kauffmann
G W
GW
D000328:Adult; D000368:Aged; D002292:Carcinoma, Renal Cell / Q000175:diagnosis / Q000473:pathology*; D003287:Contrast Media; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D007472:Iohexol / Q000031:analogs & derivatives; D007680:Kidney Neoplasms / Q000175:diagnosis / Q000473:pathology*; D008207:Lymphatic Metastasis; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011446:Prospective Studies; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods
D003287:Contrast Media; D007472:Iohexol; C038192:iopromide; D019786:Gadolinium DTPA
Staging von Nierenzellkarzinomen in MRT und CT--prospektive histologisch kontrollierte Studie.