A 45-year-old woman, mother of four children, comes to the emergency room
complaining of a sudden onset of the epigastric and right upper quadrant pain, radiating to the
back, accompanied by vomiting. On examination, tenderness is elicited in the right upper
quadrant, bowel sounds are decreased, and laboratory data shows leukocytosis, normal serum
levels of amylase, lipase, andbilirubin. The most likely diagnosis is:
Select one of the following: