A 58-year-old woman is brought to the physician by her husband for severe abdominal pain and fever. A CT of the abdomen is shown. Vitals are: temperature 102 F, HR 76, RR 16, BP 120/80. Bowel rest is initiated, a nasogastric tube placed, and IV saline is administered. Laboratory studies are performed and corroborate the diagnosis. Which of the following is the most appropriate next best step in management?
Biopsy of the lesion
Endoscopic retrograde cholangiopancreatography
HIDA scan
Magnetic resonance cholangiopancreatography
Whipple procedure
