What is the differential diagnosis of right upper quadrant pain besides acute cholecystitis?
- Liver: severe hepatitis with swelling and stretching of the liver capsule, liver metastasis, Fitz-Hugh-Curtis syndrome, congestive hepatopathy (hepatic vein thrombosis—Budd-Chiari syndrome), hepatoma or liver adenoma with infarction or internal bleeding
- Pancreas: pancreatitis, pseudocyst
- GI tract: peptic ulcer disease with or without perforation, acute appendicitis (retrocecal)
- Kidney: pyelonephritis, nephrolithiasis
- Lung: pneumonia, pulmonary embolism, pleurisy
- Heart: myocardial infarction, pericarditis
- Preeruptive varicella zoster