Final answer:
The symptoms suggest acute cholecystitis, which requires an abdominal ultrasound or HIDA scan for diagnosis. Initial treatment includes supportive care and potentially antibiotics, followed by surgical removal of the gallbladder.
Step-by-step explanation:
The symptoms described - RUQ pain radiating to the back, nausea/vomiting (n/v), fever, and worsening after fatty food intake, combined with a positive Murphy's sign - are highly suggestive of acute cholecystitis, which is the inflammation of the gallbladder. Normal laboratory results can sometimes occur in the early stage of the condition. The typical workup for suspected acute cholecystitis includes an abdominal ultrasound or a hepatobiliary iminodiacetic acid (HIDA) scan to assess gallbladder function and look for gallstones. Treatment (Txt) typically involves initial supportive care such as fasting, IV fluids, and pain control, followed by antibiotics if an infection is suspected, and cholecystectomy, which is the surgical removal of the gallbladder, often performed laparoscopically.