Longitudinal section of lobular septa

Arrows demonstrate septal thickening due to interstitial edema and fibrosis. Hematoxylin-eosin; original magnification: x4.

Reproduced with permission from: Mandel, J, Mark, E, Hales, C. Pulmonary veno- occlusive disease. Am J Respir Crit Care Med 2000; 162:1964. Official Journal of the American Thoracic Society © American Lung Association.

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