Various pathological causes have been considered as leading to an increase in interarm BP differences such as atherosclerosis, vasculitis, fibromuscular hyperplasia
, connective tissue, and thoracic outlet compression.
The vessels are thick walled, with fibromuscular hyperplasia
26) Indeed, in the American Heart Association classification of atherosclerosis, the atheroma-prone lesion is not the fatty streak but rather a region of intimal fibromuscular hyperplasia, referred to as "adaptive intimal thickening.
Furthermore, there are a variety of other terms used synonymously to describe intimal thickening, such as neointima, fibromuscular hyperplasia, adaptive intimal thickening, hypertrophy, and fibroplasia, just to name some.
Third trimester PMD placentas have dilated thick-walled chorionic plate vessels with fibromuscular hyperplasia
and may have fresh or organizing thrombi (Figure 3, A) with varying degrees of luminal obliteration.
Gastric antral biopsies performed at that time showed nonspecific changes of chronic gastritis and slight fibromuscular hyperplasia of the lamina propria.
2) Histologic findings associated with gastric antral vascular ectasia include the presence of dilated vessels of the antral lamina propria, reactive foveolar epithelial changes, and fibromuscular hyperplasia of the lamina propria.
Leiomyosarcoma arising in atypical fibromuscular hyperplasia
(phyllodes tumor) of the prostate with distant metastasis.