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: Pathology
[{'content': 'Oral Lesion associated with ulcerative colitis \nSelect and explain. \nA. Lichen planus, B. Pyostomatitis Vegetans, C. Sarcoidosis, D. Dermatitis herpetiforrris', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In pyostomatitis vegetans, the oral lesions are one part of the syndrome, in which the patients also manifest concomitantly ulcerative colitis or other gastrointestinal disturbances.\nThe oral lesions consist of large numbers of broad-based papillary projections, tiny abscesses or vegetations developing in areas of intense erythema. These lesions may occur in any area of the oral cavity, although tongue involvement appears to be uncommon.', 'role': 'assistant'}]