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': 'All are the histological features of Pulmonary hypeension - \nSelect and explain. \nA. Capillaritis of alveolar septa, B. Saddle thrombi in pulmonary trunk, C. Thrombi in pulmonary vasculature, D. All', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Thrombi in pulmonary vasculature Pulmonary Hypeension o In pulmonary hypeension pathological changes are seen from main pulmonary aeries to aerioles. They are : (a) Aerioles and small pulmonary aeries : (i) Medial hyperophy (ii) Thickening and reduplication of elastic lamina. (iii) Plexiform pulmonary aeriopathy in which intraluminal tuft of capillary formation occurs in dilated thin walled aeriolar branches. (b) Medium sized Pulmonary aeries : (i) Medial hyperophy; which is not marked in secondary pulmonary hypeension. (ii) Concentric intimal thickening (iii) Adventitial fibrosis (iv) Thickening and reduplication of elastic laminae. (c) Large Pulmonary aeries : o Atheromatous deposits o Vasoocclusive disease itself may lead to pulmonary hypeension.", 'role': 'assistant'}]