This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'Buerger’s Disease is \nSelect and explain. \nA. Also known as Thromboangitis Obliterans, B. Segmental inflammatory disease, C. Affects small and medium arteries in upper and lower extremities, D. All of the above', 'role': 'user'}, {'content': "Answer: D \nExplanation: BUERGER'S DISEASE (THROMBOANGITIS OBLITERANS)\n→ Segmental inflammatory disease, affecting small and medium sized arteries in upper and lower extremities.\n→\xa0Inflammatory process involves neighboring veins and nerves.\n→\xa0Definite relationship with smoking.\nHistopathology\n→\xa0Sharply segmental acute and chronic vasculitis of small and medium vessels with thrombosis of lumen, which may undergo organization and recanalization.\n→\xa0Thrombus contains microabsecess\n\nInflammatory process extends to involve neighboring veins and nerves.\nWith time, all three structures (artery, vein and nerve) become incased in fibrous tissue.\n\nClinical Features (RIM)\n→\xa0Characterized by triad of intermittent claudication, Raynaud's phenomenon and migratory superficial vein thrombophlebitis.\n\nTypically seen in young (<40 years), male smokers.", 'role': 'assistant'}]