The classic presentation
Textbook cholecystitis looks like this: a middle-aged patient, often with a history of gallstones or biliary colic, presents with severe pain in the right upper quadrant that radiates to the back or right shoulder, fever, nausea, and a worsening course over hours. Pressing under the right costal margin while the patient inhales elicits pain severe enough to stop the breath mid-inspiration — the Murphy sign, first described in 1903.
The laboratory pattern is predictable: elevated white blood cell count, mildly elevated liver enzymes, sometimes elevated bilirubin if the stone has migrated to the common bile duct. Right-upper-quadrant ultrasound is the first imaging study — gallbladder wall thickening, pericholecystic fluid, and gallstones are the classic findings.


