This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology and Rheumatology, Subject name: Medicine
[{'content': "What diagnosis is implied by the results of this gallium scan? \nSelect and explain. \nA. Mumps, B. Paget's disease, C. Sarcoidosis, D. Septic emboli", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer C. SarcoidosisThe gallium scan shows nasal, parotid, lung, liver, spleen, subcutaneous-nodule, and mediastinal and epitrochlear lymph-node uptake. This pattern is most consistent with a diagnosis of sarcoidosis.', 'role': 'assistant'}]