atherosis


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Related to atherosis: atherosclerosis, athetosis

ath·er·o·ma

(ath'er-ō'mă),
The lipid deposits in the intima of arteries, producing a yellow swelling on the endothelial surface; a characteristic of atherosclerosis.
Synonym(s): atherosis
[G. athērē, gruel, + -ōma, tumor]

atherosis

(1) Atherosclerosis. 
(2) Atheroma.
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(a) Prevalence of histologic event Sector/event Plasmodium in cord p ([chi No Yes square]) Decidua n = 100 % n = 37 % Immune cells 61 61 26 70 0.317 Atherosis 46 46 12 32 0.254 Necrosis 2 2 1 3 0.803 Abruptio 49 49 13 35 0.148 Villi (a) Infarction 84 84 31 84 0.976 Edema 86 86 26 70 0.034 IVS Immune cells 100 100 100 100 1.000 Hemorrhage 95 95 36 97 0.560 Thrombosis 50 50 18 49 0.888 Calcifications 70 70 25 68 0.784 (a) In the villi, the following variables were also evaluated: (1) villi/field, (2) capillaries/villus, (3) immune cells, (4) fibrinoid deposits, and (5) syncytial knots.
Acute atherosis: there is fibrinoid necrosis with lipid-laden macrophages and a slight perivascular lymphocytic infiltrate (hematoxylin eosin, original magnification X20).
A, Absence of spiral artery modeling with retention of musculoelastic elements in the arterial wall; note the acute atherosis affecting the vessel on the right.
ACUTE ATHEROSIS: In the study conducted by General hospital of Massachussets.
According to Robertson, (17) acute atherosis is a lesion limited to blood vessels that have not been altered by the normal adaptive processes of implantation.
Acute atherosis is a vascular lesion observed in approximately 20 to 40% of the maternal spiral arteries.
These features are known as acute atherosis. These changes have been well brought about by special stain, PTAH, which stains fibrinoid material.
I regard the above-presented extravillous trophoblasts lesions, along with the decidual arteriolopathy (both hypertrophic and atherosis), as the complementary criteria for this type of chronic placental hypoxia in histologically borderline cases.
An interesting histologic finding among the endometrial and myometrial necrosis was a profile of a vessel containing lesion that appeared similar to the fibrinoid necrosis and atherosis seen in maternal decidual vasculopathy in pregnancy (Figure).