| Autor: |
Kauer, W. K. H., Pranti, L., Dittler, H. J., Siewert, J. R., Prantl, L |
| Předmět: |
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| Zdroj: |
Surgical Endoscopy & Other Interventional Techniques; Jul2004, Vol. 18 Issue 7, p1075-1078, 4p |
| Abstrakt: |
Background: Endosonography is currently the gold standard for the local staging of rectal carcinoma, but its accuracy varies from 62% to 91%. This study aimed to determine the accuracy of endosonography, to evaluate the interobserver variability, and to compare the performance of the 7.5-MHz and the 10-MHz ultrasound scanners.Methods: Between 1990 and 2000, 458 patients with rectal cancer were included in the study. All the patients had undergone rectal endosonography with a 7.5-MHz scan (period 1: 1990-1996) or a 10-MHz scan (period 2: 1997-2000). Endosonographic staging was compared with pathologic staging.Results: The overall rate for correctly classified patients was 69% with respect to the T category and 68% with respect to the N category. There was no difference between the two scanners. In terms of accuracy, the T3 category tumors were the most (86%) and the T4 tumors the least (36%) accurately classified. Overstaging of tumors (19%) was much more frequent than understaging (12%). A high interobserver variability of 61% to 77% was noted. For pT1 tumors, the 10-MHz scan was almost two times more accurate than the 7.5-MHz scan (71% vs 36%).Conclusions: The accuracy of endosonographic staging of rectal carcinoma very much depends on the T category. A high-resolution scanner and an experienced examiner can help to ensure that endosonography remains an important tool in the staging process of patients with rectal carcinoma, especially early carcinoma. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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