DIGITAL RECTAL EXAMINATION AND TRANSRECTAL ULTRASONOGRAPHY IN STAGINGOF RECTAL-CANCER - A PROSPECTIVE, BLIND-STUDY

Staging of rectal carcinoma before surgical treatment was performed in a prospective blind study, comparing digital rectal exploration and t ransrectal linear ultrasonography (TRUS) with the resulting pathologic al examination. TRUS underestimated depth of penetration in 3 of 33 pa tients and overestimation resulted in 9 of 74. The figures for digital examination were 5 of 18 and 20 of 76, respectively. Penetration of t he rectal wall was correctly identified in 56 of 61 patients by digita l examination and in 59 of 61 by TRUS. Specimens without penetration o f the rectal wall were identified in 26 of 33 patients by TRUS, but in not more than 13 of 33 by digital examination. Regional lymph node me tastases were present in 19 patients; none were diagnosed by digital e xamination, but TRUS identified 11 of the 19. It is concluded that TRU S will result in more patients having the possibility of local surgery for cure.