A. B. Price

I. Carcinoma of the rectum and rectosigmoid: Cancer specific long-term survival. A series of 1061 cases treated by one surgeon

The long‐term cancer specific survival based on individual follow‐up and analysis of prospectively collected data from 1061 patients undergoing resection for carcinoma of the rectum is presented. All patients were operated on and managed by one surgeon. Survival data for 978 cases were analyzed according to the methods of Kaplan and Meier,9 and Gehan.6 Results have been presented as cancer specific survival times in months and as percentage survivor rates at five‐year intervals. The median overall cancer specific survival time was 96 months. Five, ten, 15, and 20‐year survival rates were 56, 49, 47, and 46%, respectively. After a potentially curative resection of the tumor, the corresponding percentages were 69, 60, 57, and 56%. Age and sex were not significant prognostic factors. A death rate from recurrent cancer of nil was seen after 15.4 years. At this point, the cancer specific survival rates were 77% for patients in Stage A, 59% in Stage B, 37% in Stage C, and 9% for patients with tumors invading adjacent organs (D1), while no patient with macroscopic metastases to distant organs (Stage D2) survived beyond four and a half years (median, 11 months).

Palliative operative management in rectal carcinoma

The results of palliative operative management of 338 patients with rectal carcinoma managed by one of the authors are presented. Postoperative mortality was higher for patients undergoing palliative resection (11.7 per cent) than colostomy bypass (5.3 per cent) or diagnostic laparatomy (6.8 per cent). Cancer specific survival following palliative resection was significantly (P<0.001) longer than that following colostomy bypass or diagnostic laparotomy for tumor Stages D1 (local visceral involvement) and D2 (distant metastases). However, in patients with liver or peritoneal metastases alone, cancer specific survival did not differ significantly after the operations of resection or colostomy bypass. The failure to demonstrate improved survival after resection of the primary tumor in these latter two groups with distant metastases indicates the dominant role of volume of tumor tissue present in these situations. The results suggest that longer survival following pallitative resection reflects a bias of patient selection towards more favorable cases.

The risk of rectal carcinoma following colectomy in ulcerative colitis.

In a series of 1439 patients with ulcerative colitis, managed by one of the authors (E.S.R.H.), surgical resection was performed on 374 patients (26 per cent): colectomy, 273 (subtotal colectomy and mucous fistula, 172, colectomy and primary ileorectal anastomosis, 101); proctocolectomy, 61; and miscellaneous procedures, 40. Of the 172 patients undergoing subtotal colectomy and mucous fistula, 93 (54 per cent) subsequently required rectal excision, 33 (19 per cent) had ileorectal anastomosis performed as a second procedure, and in 46 (27 per cent) subsequently developed as a mucous fistula. Two hundred seventy-three patients were at risk for the development of rectal, cancer after subtotal colectomy; ten patients (3.6 per cent) subsequently developed rectal cancer. The cumulative probability of developing rectal cancer after subtotal colectomy reached 17 per cent at 27 years from disease onset. The tumors were more advanced in stage and of higher grade malignancy than those of a parallel general series of patients with rectal cancer uncomplicated by inflammatory bowel disease. Colectomy and ileorectal anastomosis has been successful for most patients. However, the experience of this series highlights the danger of carcinomatous transformation in the retained rectum, the requirement for regular long-term follow-up, the need for markers of precancerous change, and the value, where relevant, of prophylactic proctectomy.

Results of operative management of Crohn’s disease: A series of 50 patients managed by one surgeon

A computer analysis has been made of clinical experience of Crohn’s disease in Australian patients. Between 1950 and 1978, 50 patients were managed for Crohn’s disease by one of the authors (E.S.R.H.). This group represented 3.1. per cent of 1608 patients treated during the same period for primary inflammatory bowel disease. The mean follow-up period was 8.4 years. Thirty-nine of the 50 patients were female and 11 male. The small intestine was involved in seven patients, large intestine in 17 and both small and large intestine in 26. Symptoms were related to the anatomic localization of disease. Four patients have died (two postoperative deaths and two unrelated to Crohn’s disease). Forty-nine of the 50 patients required operative procedures and 36 underwent one or more definitive operations with curative intention. A total of 124 operations was performed, 70 of which were definitive. Twenty-nine of the 36 patients managed by a definitive operation developed recurrence, defined to include reactivation of disease in intestinal segments leftin situ. Ten patients developed two or more recurrences. Multiple recurrences were most frequent after operation for combined small- and large-intestinal Crohn’s disease. No patient with large-intestinal Crohn’s disease alone developed more than one recurrence. Each patient undergoing subtotal colectomy with ileorectal anastomosis (six patients) or ileostomy (nine patients) required one or more further definitive operations. Recurrence was more frequent after the first than second definitive operation (P=0.007), the median recurrence-free intervals being 11 and 23 months, respectively.