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': 'All are true about Cancrum Oris except : \nSelect and explain. \nA. Associated with malnutrition and vitamin deficiency, B. Follows chronic infection, C. Involves jaw, D. Treatment is excision and skin grafting with tubed pedicle graft', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Cancrum Oris (also k/a Noma and Gangrenous stomatitis) :\n\nCancrum Oris is now rarely seen in developed countries but is still not uncommon in many developing countries.\nIt is a gangrenous process of the mouth, which starts suddenly, rapidly involve the adjacent tissues of the face, quickly becomes well demarcated, and then spreads no further. It most often affects one or both sides of the jaw, and occasionally the front of the face (mouth, lips, nose & chin). The gangrenous process may spread to destroy the bones of the face.\nThis disease occurs primarily in a severely malnourished child less than 5 yrs of age. Often they have had a preceding illness such as measles, malaria, scarlet fever, tuberculosis, malignancy or immunodeficiency, which has weakened the general health of the child.\nThe exact cause is not known but may be bacterial. Fusiformis & Borrelia are largely responsible, but the ds. is not contagious.\nUntreated Cancrum Oris is almost always quickly fat.: due to associated illness or a complication, such as a septicemia or aspiration pneumonia.\n\nManagement involves :\n\ncorrection of the general condition.\nantibiotics (Penicillin + Metronidazole).\nExcision of the dead tissue.\nPlastic surgery.', 'role': 'assistant'}]