title: [Occurrence of a special type of "polypoid cushion" and valve-like  formations in arteries].
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.
mesh_terms: D001158:Arteries / Q000473:pathology*; D002971:Cleft Lip / Q000473:pathology; D006801:Humans; D007223:Infant; D009092:Mucous Membrane / Q000473:pathology; D009297:Nasal Mucosa / Q000098:blood supply* / Q000473:pathology
vernacular_title: Entstehung einer besonderen Form der "polypoiden Polster" und klappenähnlicher Bildungen in Arterien