The investigators first hypothesized the increased rate in teaching hospitals could be due to a higher concentration of case referrals to these high-volume centers, following a trend of centralizing cancer procedures. However, there has been no other sign that colon and rectal cancer procedures are following this trend.
Another option considered by Dr. Peery and her colleagues was that increased procedures may stem from a rise in colorectal cancer screening; however, the data indicate screenings did not change from 2010 to 2015, leaving investigators with few final guesses to go on.
“It is also conceivable that increasing production pressure and inadequate reimbursement for endoscopic mucosal resection may persuade endoscopists to refer patients with complex nonmalignant colorectal polyps for surgery,” said Dr. Peery and fellow investigators. “Finally, there is the issue of risk ... for endoscopists without additional training in advanced endoscopic resection, these risks may be perceived as too great, especially when they have the option of referring for a surgical resection.”
There is a possibility that the incidence of surgery was over- or underestimated, as investigators were using ICD-9 codes to identify cases, and patients with diverticulitis were also excluded, which may have affected results.
The investigators reported no relevant financial disclosures.
ezimmerman@frontlinemedcom.com
SOURCE: Peery A et al. Gastroenterology. 2018 Jan 6. doi: 10.1053/j.gastro.2018.01.003.