Final answer:
The subject of the question is Medicine. The symptoms of jaundice, fever, and RUQ pain and tenderness in a 51-year-old man suggest obstructive jaundice, which can be caused by various conditions. Further medical evaluation is needed for a definitive diagnosis.
Step-by-step explanation:
The subject of this question is Medicine. The question pertains to a 51-year-old man who presented with new onset jaundice, fever, and right upper quadrant (RUQ) pain and tenderness. The question is seeking a diagnosis for the patient based on the presented symptoms.
Based on the information provided, the symptoms of jaundice, fever, and RUQ pain and tenderness are indicative of obstructive jaundice. This can be caused by conditions such as cholangitis, cirrhosis, pancreatitis, cholecystitis, or gallstones. Further medical evaluation and diagnostic tests would be necessary to determine the specific cause of the patient's symptoms.