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Aims
Pembrolizumab has shown promising results for patients with programmed cell death ligand‐1 (PD‐L1)‐positive advanced biliary tract cancer in an ongoing clinical trial. However, data on PD‐L1 expression in bile duct cancers is limited, and the frequency of PD‐L1 positivity varies, which may be partly due to the assay used. The aim of this study was to evaluate PD‐L1 expression status in bile...
ObjectivesTo compare survival in older (≥65) and younger (<65) individuals with biliary tract cancer (BTC) and to determine whether treatment efficacy varies according to age.
DesignRetrospective cohort study and nested case–control study.
SettingTertiary referral center in Korea.
ParticipantsFive hundred thirty–one individuals diagnosed with BTC from 2003 to 2011.
MeasurementsDemographic and...
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