A 60-year-old woman with a history of chronic pancreatitis comes with worsening epigastric pain radiating to the back associated with nausea and vomiting. She has lost 10 kg in the past 4 months. She has no evidence of jaundice. LFT and serum amylase/lipase are within normal limits. CT scan of the abdomen shows the following. What would be the most appropriate next step in the management of this patient?