This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pathology
[{'content': 'Pathological feature of pyogenic granuloma \nSelect and explain. \nA. Epitheloid cells, B. Cavernous hemangioma, C. Granulation tissue, D. Giant cells', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pyogenic granulomas) are pedunculated masses usually found on the gingiva of children, young adults, and pregnant women. These lesions are richly vascular and typically are ulcerated, which gives them a red to purple color. In some cases, growth can be rapid and raise fear of a malignant neoplasm. However, histologic examination demonstrates a dense proliferation of immature vessels similar to that seen in granulation tissue. Pyogenic granulomas can regress, mature into dense fibrous masses, or develop into a peripheral ossifying fibroma. Complete surgical excision is definitive treatment. (Robbins basic pathology,9th edition,pg no.553)', 'role': 'assistant'}]