Which of the following signs or symptoms would you most likely encounter in a patient with an inflamed gallbladder?

In a patient with an inflamed gallbladder, commonly known as cholecystitis, the most likely symptom to encounter is pain in the right shoulder. This phenomenon occurs due to the irritation of the diaphragm, which shares nerve pathways with the gallbladder. This referred pain often manifests in the right shoulder area, particularly when the gallbladder is inflamed.

Typically, patients might also experience other symptoms such as severe abdominal pain, particularly in the right upper quadrant, and nausea or vomiting. While the presence of dark red blood in vomit or bruising around the umbilicus could hint at other serious conditions, they do not directly relate to gallbladder inflammation. Inflammation or pain in the right lower quadrant is more indicative of conditions like appendicitis rather than gallbladder issues.