[Colorectal cancer: are diagnostic delay, degree of spread and survival related? Clinical analysis of 307 cases followed up for more than 4 years].

: It seems logical to think that the longer the interval between the patient's first symptom of colorrectal cancer and operation, the greater the tumoral extension found by the surgeon will be, and the lower the postoperative survival. Nevertheless, there is much evidence to indicate that this may not always be true. We've analyzed the problem in 307 patients operated of colorectal cancer in our service from January 1979 to December 1984 and followed-up until now. We investigated the time interval from the first clinical symptom until operation, and survival. These variables were related to the Duke grade. As regards the preoperative interval, the average (in months) for Duke's grade A was 7.41 (sigma = 16.88), for D it was 7.41 (sigma = 9.47) and for C, 5.13 (sigma = 8.41). There were no statistically significant differences. As for survival, after four years all the grade A patients, 64% of the grade B patients and 35% of the grade C patients followed-up survived. We've found no relation between diagnostic delay and postoperative survival. These results suggest that it is not true that the longer the symptomatic period, the greater the tumoral spread. As such, diagnostic delay is not a good prognostic indicator for predecting tumoral spread or survival.