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Gallbladder cancer - no improvement in survival over time in a Swedish population
Per Lindnér1, Erik Holmberg2, Lo Hafström1
1a Transplant Institute, Institute of Clinical Sciences Sahlgrenska Academy at University of Gothenburg, Sahlgrenska University Hospital , Gothenburg , Sweden.
Insights
Gallbladder cancer (GBC) survival remains poor despite improved diagnostics. While stage migration occurred, leading to better survival for some, overall GBC outcomes did not significantly improve between 2000-2014.
Area of Science:
- Oncology
- Surgical Oncology
- Epidemiology
Background:
- Gallbladder cancer (GBC) is associated with a very poor prognosis.
- Understanding trends in GBC incidence, treatment, and survival is crucial for improving patient outcomes.
Purpose of the Study:
- To analyze trends in GBC incidence, diagnosis, treatment, and overall survival.
- To evaluate changes in GBC patient outcomes over a 15-year period in a defined Swedish region.
Main Methods:
- A population-based cohort study of 546 individuals diagnosed with GBC between 2000 and 2014.
- Patients were categorized into three 5-year periods to assess changes in survival, diagnosis, staging, grading, and treatment.
- Exclusion criteria included patients deceased at diagnosis and those with non-invasive cancer.
Main Results:
- GBC incidence remained stable; however, there was a significant stage migration towards more advanced M1 disease.
- Median survival showed a slight increase from 4.7 months to 6.1 months across the study periods.
- Surgical outcomes improved, with better survival observed after liver bed resection compared to cholecystectomy alone, despite increased chemotherapy use with no significant survival impact.
Conclusions:
- Despite advancements in diagnostic methods and evidence of stage migration, overall GBC survival rates did not improve significantly.
- The study highlights the need for novel therapeutics to downsize tumors and enhance the efficacy of curative-intent surgery for GBC.
Background:
Gallbladder cancer (GBC) has an extremely poor outcome. The aim of this study was to examine trends in GBC incidence, treatment and overall survival in a complete population of affected persons in a well-defined region in Sweden in 2000-2014.
Material And Methods:
Altogether 546 individuals with GBC were identified at Sweden's Regional Cancer Centre West. Subjects were grouped into three 5-year periods (Period A: 2000-2004, Period B: 2005-2009 and Period C: 2010-2014) and the survival, diagnosis, staging, grading and treatment for each period were investigated. Patients dead at date of diagnosis (n = 39) and patients with not invasive cancer (n = 25) were not included in the analysis.
Results:
The incidence was unchanged over the study period. The survival curves for the time periods were not significantly separated. Median survival was 4.7 months in Period A, 4.8 months in Period B and 6.1 months in Period C. Stage migration to more M1 in Periods B and C occurred and survival was improved for these cohorts. More individuals were diagnosed using only diagnostic imaging (p = .02). There were 177 curatively aiming operative procedures carried out on 482 persons (37%). The survival after surgery for the three periods improved over time (p = .02). Individuals who underwent a liver bed resection after a cholecystectomy had better survival than individuals who had cholecystectomy combined with liver resection. More persons were treated with chemotherapy, but no significant impact was found on survival in the total GBC population.
Conclusions:
Although there were signs of improved diagnosis of GBC, the survival rate did not improve over time. There was a significant stage migration to more M1 in Periods B and C. Therapeutics able to downsize a cancer and increase the effectiveness of surgery with curative intent are warranted.
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