[Placental vascular changes in maternal diabetes mellitus]

Uniform pathological changes characteristic for the diabetes mellitus in the placenta were not revealed. In 63 per cent of the 22 cases morphological changes in the small- and middle vessels were observed. The most severe pathological changes were seen in the media in form of concentric fibrosis. It caused narrowing of the lumen, although the intima remained undamaged. It was not possible to detect a correlation between the severity of damage to the placentar vessels and groups described by White.