Entstehung einer besonderen Form der »polypoiden Polster» und klappenähnlicher Bildungen in Arterien

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Abstract
Intraarterial structures, known as ‘polypoid cushions’ and ‘valve-like’ projections at arterial branching sites, were observed in serial sections of human cleft lip and nasal mucous membrane biopsies. A particular type of ‘polypoid cushions’, which additionally contains a small artery in its center, is distinguished. It is suggested that both the particular type of ‘polypoid cushions’ and these ‘valve-like’ projections originate from the invagination of the entire vessel wall at arterial branching sites according to the location of the dissection or damage. The differences between these ‘valve-like’ formations and genuine arterial valves are mentioned.

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