Treatment and Prognosis of the Oldest Old with Colorectal Cancer

Introduction The demographic trend will lead to an increase of elderly persons in Germany in the future. The population is becoming smaller and older because of the deficiency in childbirths. This results in demographic ageing of the population in Germany. Studies addressing patients 85 years, the oldest old, are becoming more and more important. Materials and Methods The prospectively collected data of 141 patients 85 years with colorectal carcinoma treated between 1995 and 2014 were analysed retrospectively. Treatment, complications and prognosis were compared with a historical group of patients 85 years treated previously between 1978 and 1994 (n=57) and with a less old group of patients 75-84 years old treated between 1995 and 2014 (n=726). Results The cohort consisted of 64 men and 77 women. 88 patients had colon carcinoma, 53 patients rectal carcinoma. 127 patients were treated with tumour resection; 112 were classified as R0. Compared with the historical cohort (1978-1994), the number of patients increased, and more patients were given tumour resection (74 vs. 90%, p=0.003) and fewer patients had synchronous distant metastases (28 vs. 14%, p=0.015). The 5-year locoregional recurrence rate after curative resection decreased from 11.5 to 1.4% (p=0.027). Comparison with the younger age group (75-84 years) revealed more women (55 vs. 42.3%, p=0.007), more emergencies (22 vs. 9.8%, p<0.001) and less frequent neoadjuvant treatment (11 vs. 3%, p=0.003). Morbidity (41 vs. 31.2%, p=0.032) and mortality (16 vs. 5%, p<0.001) were higher in the oldest old. After curative resection and exclusion of postoperative deaths, overall survival (2-year rate 66.4%, 5-year rate 32.9%) was found to be worse than for the less old group, whereas cancer-related survival (2-year rate 93.1%, 5-year rate 86.7%) was similar. Conclusion The number of oldest old patients 85 years with colorectal carcinoma will further increase. These patients have a higher risk of postoperative complications. After recovering from the surgery cancer-related survival is not worse than for less old patients.