Which assessment finding would confirm a suspicion of bladder infection in a patient with fever, abdominal pain, and increased urinary frequency?

• A. A sharp pain when percussing the right flank
• B. Positive Murphy's sign
• C. Rebound tenderness in the left flank
• D. Dullness to percussion over the liver

Answer: (B)

Understanding how physical signs map to organs helps in evaluating fever with urinary symptoms. Murphy's sign is a test for gallbladder inflammation: you press under the right costal margin and, with a deep breath, the patient may stop inhaling due to pain. That reaction points to cholecystitis, not a bladder infection. For a bladder infection, the exam would more likely show tenderness in the suprapubic area, and diagnosis is confirmed with urinalysis (evidence of infection) and possibly culture. The other signs described point to the kidneys or liver or are nonspecific abdominal findings, not the bladder. So, in this context, the most relevant indicator would be suprapubic tenderness supported by urine tests, rather than a sign related to the gallbladder.