Systematic review and meta-analysis of reports of patients with gastric cancer aged 80 years and older.

The number of elderly patients in gastric cancer surgery is rapidly rising. Almost all data on gastric cancer in people over the age of 80 come from a single institution, and there is no systematic review of a large number of patients. Therefore, we conducted a comprehensive analysis of the prognosis of patients with gastric cancer surgery who were aged 80 years or older. From January 2010 to November 2021, reports on gastric cancer in the elderly aged 80 and over were gathered. We searched PubMed for "Gastric cancer and elderly and 80 years old" as a keyword, and 253 reports were extracted. The Ichushi-Web database was also searched using the phrase "stomach cancer and 80 years old," and 366 records were found. The random-effect model was used to determine the average 5-year survival rate, and the heterogeneity was evaluated. The proportion of male patients, patients who had surgery after 2010, patients with stage I, total gastrectomy, lymph node dissection, and the presence of complications were used as the explanatory variables in meta-regressions to investigate the cause of prognosis variability. More than 50 surgical cases were reported, 8 from PubMed and 2 from the Ichushi-Web database, with information on surgical procedures, prognosis, and complications, in a total of 1182 patients. Of the ten reports, eight were from Japan and two were from South Korea and Taiwan. The number of patients ranged from 55 to 217, with an average 5-year survival rate of 57%. In terms of the relationship between the time of surgery and prognosis, the overall prognosis for patients who had surgery before 2010 and those who had surgery after 2010 was almost similar. Reports with a high proportion of stage I showed a good prognosis. The rate of total gastrectomy, the proportion of lymph node dissection above D1 + , or surgical complications had no effect on prognosis. Patients with gastric cancer aged 80 years or older who underwent radical surgery had a 5-year survival rate of up to 57%. Postoperative complications appeared to have a minor impact.