Dying with dignity: the challenges of end-of-life care in patients with substance use disorders.

Substance use disorder is a chronic disease carrying a high risk of morbidity and mortality. We report a case of a patient on long-term opioid agonist treatment who was diagnosed with metastatic cholangiocarcinoma and was referred to palliative care services almost contemporaneously with this diagnosis. In this report, we explore the challenges posed in offering holistic care during the end of life of a patient with a history of opioid dependence.