The Kaiser Permanente Northern California (KPNC) Gastric-Esophageal Cancer Program was established in 2016 to consolidate the care of patients with gastric cancer and increase physician specialization and standardization.
In a retrospective study, Kaiser Permanente investigators compared the outcomes of the 942 patients diagnosed before the regional gastric cancer team was established with the outcomes of the 487 patients treated after it was implemented. Overall, the transformation appears to enhance the delivery of care and improves clinical and oncologic outcomes.
For example, among 394 patients who received curative-intent surgery, overall survival at 2 years increased from 72.7% before the program to 85.5% afterward.
“The regionalized gastric cancer program combines the benefits of community-based care, which is local and convenient, with the expertise of a specialized cancer center,” said coauthor Lisa Herrinton, PhD, a research scientist at the Kaiser Permanente division of research, in a statement.
She added that, in their integrated care system, “it is easy for the different physicians that treat cancer patients – including surgical oncologists, medical oncologists, and radiation oncologists, among others – to come together and collaborate and tie their work flows together.”
The study was published in the Journal of Clinical Oncology.
Gastric cancer accounts for about 27,600 cases diagnosed annually in the United States, but the overall 5-year survival is still only 32%. About half of the cases are locoregional (stage I-III) and potentially eligible for curative-intent surgery and adjuvant therapy, the authors pointed out in the study.
As compared with North America, the incidence rate is five to six times higher in East Asia, but they have developed better surveillance for early detection and treatment is highly effective, as the increased incidence allows oncologists and surgeons to achieve greater specialization. Laparoscopic gastrectomy and extended (D2) lymph node dissection are more commonly performed in East Asia as compared with the United States, and surgical outcomes appear to be better in East Asia.
Regionalizing care
The rationale for regionalizing care was that increasing and concentrating the volume of cases to a specific location would make it more possible to introduce new surgical procedures as well as allow medical oncologists to uniformly introduce and standardize the use of the newest chemotherapy regimens.
Prior to regionalization, gastric cancer surgery was performed at 19 medical centers in the Kaiser system. Now, curative-intent laparoscopic gastrectomy with Roux-en-Y gastrojejunostomy or esophagojejunostomy and side-to-side jejunojejunostomy is subsequently performed at only two centers by five surgeons.
“The two centers were selected based on how skilled the surgeons were at performing advanced minimally invasive oncologic surgery,” said lead author Swee H. Teh, MD, surgical director, gastric cancer surgery, Kaiser Permanente Northern California. “We also looked at the center’s retrospective gastrectomy outcomes and the strength of the leadership that would be collaborating with the regional multidisciplinary team.”
Dr. Teh said in an interview that it was imperative that their regional gastric cancer centers have surgeons highly skilled in advanced minimally invasive gastrointestinal surgery. “This is a newer technique and not one of our more senior surgeons had been trained in [it],” he said. “With this change, some surgeons were now no longer performing gastric cancer surgery.”
Not only were the centers selected based on the surgical skills of the surgeons already there, but they also took into account the locations and geographical membership distribution. “We have found that our patients’ traveling distance to receive surgical care has not changed significantly,” Dr. Teh said.
