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. 2021 Jul 31;8(8):91. doi: 10.3390/jcdd8080091

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Histology of the ductus arteriosus. (a) Subendothelial intimal cushion (case 5) (50× magnification, black arrow); (b) elastic fiber–van Gieson (50× magnification) showed the interruption of the internal elastic lamina (black arrow); (c) presence of lacunar spaces (white arrow head) in the media closed to dissection (black arrow) (100× magnification) with thrombus formation (Th); (d) lacunar spaces, cystic medial necrosis (*) in the media, under the intimal proliferation (black arrow head) (100×). (e) High-power view of the insert highlighted in (c). (f) High-power view of the insert highlighted in (d).