A 45-year-old woman presents to the emergency department for evaluation of a 12 hour episode of intermittent, debilitating, postprandial right upper quadrant pain associated with nausea and occasional vomiting. The pain can last from 30 minutes to 2 hours, often radiates to the upper back between the shoulder blades, and is not associated with bowel movements or exercise. The patient is also quite jaundiced; however, she denies any fever, weight loss or night sweats. Additionally, she states she has been using antacids and H2-blockers but they have been ineffective. She denies significant alcohol use. What is the most likely diagnosis for this patient?
