[Gastrointestinal imaging with hydrosonography and hydro-CT].
OBJECTIVE
To determine the accuracy of hydrosonography (HUS) und hydro-CT (HCT) for staging colon carcinoma.


METHODS
74 patients in whom colorectal carcinoma was suspected were examined. At HUS the colonic wall ist distended by a methylcellulose/water suspension and the carcinoma is enlarged to perform staging of the tumour. HCT is a spiral-CT optimised for parenchymal and vessel contrast. Before the scan is started, up to two litres of fluid are given rectally and spasmolytics are administered to reduce peristalsis. Colorectal carcinomas were classified according to the TNM system and histopathologic correlation was achieved.


RESULTS
Out of 43 (HUS) and 39 (HCT) colonic lesions 33 (77%) and 36 (92%), respectively, were diagnosed. T-stage accuracy was 88% (HUS) and 66% (HCT), N-stage accuracy 33% and 46% and M-stage accuracy 88% and 85%, respectively.


CONCLUSIONS
The T-stage of sonographically visible tumours of the colon is determined precisely by HUS. In contrast to predicting lymph node involvement distant metastases are reliably detected by both methods. If performed together, HUS and HCT achieve high diagnostic accuracy for staging carcinoma of the colon.
Düx
M
M
Abteilung Radiodiagnostik, Ruprecht-Karls-Universität Heidelberg.
Richter
G M
GM
Roeren
T
T
Heuschen
U
U
Kauffmann
G W
GW
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002400:Cathartics / Q000008:administration & dosage; D003106:Colon / Q000473:pathology; D012809:Colon, Sigmoid / Q000473:pathology; D003110:Colonic Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D003287:Contrast Media; D003937:Diagnosis, Differential; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008297:Male; D008747:Methylcellulose / Q000008:administration & dosage; D008875:Middle Aged; D012680:Sensitivity and Specificity; D012811:Sigmoid Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014463:Ultrasonography; D014867:Water
D002400:Cathartics; D003287:Contrast Media; D014867:Water; D008747:Methylcellulose