In Situ Thrombosis of Small Pulmonary Arteries in Pulmonary Hypertension Developing after Chemotherapy for Malignancy

Figure 2

Histopathological findings in small pulmonary arteries and pulmonary veins of case 2. (a) Peripheral small pulmonary artery with newly formed eccentric intimal fibrous proliferation considered to be a thrombus, because intimal lesions usually form concentric layers in plexogenic arteriopathy. (b) The peripheral small pulmonary artery (40 μm in diameter) shows complete occlusion by a thrombus. (c) Most small pulmonary veins are almost occluded by newly formed thrombi.

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(b)

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