Improved outcomes
The cohort included 1,429 eligible patients all stages of gastric cancer; one-third were treated after regionalization, 650 had stage I-III disease, and 394 underwent curative-intent surgery.
Overall survival at 2 years was 32.8% pre- and 37.3% post regionalization (P = .20) for all stages of cancer; stage I-III cases with or without surgery, 55.6% and 61.1%, respectively (P = .25); and among all surgery patients, 72.7% and 85.5%, respectively (P < .03).
Among patients who underwent surgery, the use of neoadjuvant chemotherapy increased from 35% to 66% (P < .0001), as did laparoscopic gastrectomy from 18% to 92% (P < .0001), and D2 lymphadenectomy from 2% to 80% (P < .0001). In addition, dissection of 15 or more lymph nodes also rose from 61% to 95% (P < .0001). Post regionalization, the resection margin was more often negative, and the resection less often involved other organs.
The median length of hospitalization declined from 7 to 3 days (P < .001) after regionalization but all-cause readmissions and reoperation at 30 and 90 days were similar in both cohorts. The risk of bowel obstruction was less frequent post regionalization (P = .01 at both 30 and 90 days), as was risk of infection (P = .03 at 30 days and P = .01 at 90 days).
The risk of one or more serious adverse events was also lower (P < .01), and 30-day mortality did not change (pre 0.7% and post 0.0%, P = .34).
Generalizability may not be feasible
But although this was successful for Kaiser, the authors note that a key limitation of the study is generalizability – and that regionalization may not be feasible in many U.S. settings.
“There needs to be a standardized workflow that all stakeholders agree upon,” Dr. Teh explained. “For example, in our gastric cancer staging pathway, all patients who are considered candidates for surgery have four staging tests: CT scan, PET scan and endoscopic ultrasound [EUS], and staging laparoscopy.”
Another important aspect is that in order to make sure the workflow is smooth and timely, all subspecialties responsible for the staging modalities need to create a “special access.” What this means, he continued, is for example, that the radiology department must ensure that these patients will have their CT scan and PET scans promptly. “Similarly, the GI department must provide quick access to EUS, and the surgery department must quickly provide a staging laparoscopy,” Dr. Teh said. “We have been extremely successful in achieving this goal.”
Dr. Teh also noted that a skilled patient navigator and a team where each member brings high-level expertise and experience to the table are also necessary. And innovative technology is also needed.
“We use artificial intelligence to identify all newly diagnosed cases of gastric [cancer], and within 24 hours of a patient’s diagnosis, a notification is sent to entire team about this new patient,” he added. “We also use AI to extract data to create a dashboard that will track each patient’s progress and outcomes, so that the results are accessible to every member of the team. The innovative technology has also helped us build a comprehensive survivorship program.”
They also noted in their study that European and Canadian systems, as well as the Department of Veterans Affairs, could probably implement components of this, including enhanced recovery after surgery.
The study had no specific funding. Dr. Teh and Dr. Herrinton have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
