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. Author manuscript; available in PMC: 2007 Jul 17.
Published in final edited form as: Clin Chest Med. 2007 Mar;28(1):23–vii. doi: 10.1016/j.ccm.2006.11.010

Figure 4.

Figure 4

Distribution of collagen IV, a component of basement membrane of endothelial cells (arrows) in PH pulmonary arteries. A and B. Plexiform lesion. C. Pulmonary artery with medial thickening. The collagen IV basement membrane of alveolar capillaries shows the clear demarcation of capillary basement membrane.