Cancer Res Treat.  2022 Jan;54(1):208-217. 10.4143/crt.2021.421.

First Course of treatment and Prognosis of Exocrine Pancreatic Cancer in Korea from 2006 to 2017

Affiliations
  • 1Center for Liver and Pancreatobiliary Cancer, National Cancer Center, Goyang, Korea
  • 2Division of Cancer Registration and Surveillance, National Cancer Center, Goyang, Korea
  • 3Department of Cancer Control & Population Health, Graduate School of Cancer Science and Policy, National Cancer Center, Goyang, Korea

Abstract

Purpose
Hospital-based clinical studies have limitations in holistic assessment of cancer treatment and prognosis, as they omit out-of-hospital patients including elderly individuals. This study aimed to investigate trends in initial treatment and corresponding prognosis of patients with exocrine pancreatic cancer (EPC) in Korea.
Materials and Methods
The Korea Central Cancer Registry data of patients with EPC from 2006 to 2017 were retrospectively reviewed. We defined the first course of treatment (FT) as the cancer-directed treatment administered within four months after cancer diagnosis according to Surveillance, Epidemiology, and End Results (SEER) program.
Results
Among 62,209 patients with EPC, localized and regional (LR) SEER stage; patients over 70 years old; and ductal adenocarcinoma excluding cystic or mucinous (DAC) accounted for 40.6%, 50.1%, and 95.9%, respectively. “No active treatment” (NT, 46.5%) was the most frequent, followed by non-surgical FT (28.7%) and surgical FT (22.0%). Among 25,198 patients with LR EPC, surgical FT increased (35.9% to 46.3%) and NT decreased (45.0% to 29.5%) from 2006 to 2017. The rate of surgical FT was inversely related to age (55.1% [< 70 years], 37.3% [70-79 years], 10.9% [≥ 80 years]). Five-year relative survival rates of LR DAC were higher after surgical FT than after NT in localized (46.1% vs. 12.9%) and regional stage (23.6% vs. 4.9%) from 2012 to 2017.
Conclusion
Less than half of overall patients with LR EPC underwent surgical FT, and this proportion decreased significantly in elderly individuals. Clinicians should focus attention on elderly patients with EPC to provide appropriate medical advice.

Keyword

Pancreatic neoplasms; Therapeutics; Survival rate; Registries

Figure

  • Fig. 1 Yearly cases, treatment pattern, and prognosis of exocrine pancreatic cancer from 2006 to 2017. (A) All Surveillance, Epidemiology, and End Results (SEER) stages (n=62,209). (B) Overall 5-year relative survival rates according to SEER stage. FT, first course of treatment.

  • Fig. 2 Treatment pattern and prognosis of patients with ductal adenocarcinoma. (A) Yearly cases and treatment pattern in localized and regional Surveillance, Epidemiology, and End Results (SEER) stage. (B) Proportion of patients receiving surgical first course of treatment and no active treatment according to age group in localized and regional SEER stage. (C) Yearly cases and treatment pattern in distant SEER stage. (D) Overall 5-year relative survival rates according to SEER stage and treatment pattern. FT, first course of treatment; NT, no active treatment.

  • Fig. 3 Treatment pattern and prognosis of patients with mucinous and cystic adenocarcinomas. (A) Yearly cases and treatment pattern in localized and regional Surveillance, Epidemiology, and End Results (SEER) stage. (B) Overall 5-year relative survival rates according to SEER stage and treatment pattern. FT, first course of treatment; NT, no active treatment; RT, radiotherapy.


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