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a sebaceous cyst.
a mass of yellowish fatty and cellular material that forms in and beneath the inner lining of the arterial walls.
Historical Examples

The wall of the aneurism is atheromatous, or calcified; the middle coat may be atrophied.
Special Report on Diseases of the Horse United States Department of Agriculture

Can the atheromatous process be influenced with equal or with any success?
The Lettsomian Lectures 1900-1901 J. Mitchell Bruce

These “abscesses” are frequent and in rupturing leave open ulcers with smooth bases, the atheromatous ulcer.
Arteriosclerosis and Hypertension: Louis Marshall Warfield

Thrombosis is favored, and where atheromatous ulcers are formed, embolism is to be feared.
Arteriosclerosis and Hypertension: Louis Marshall Warfield

Hauser91 found an aneurismal dilatation of an atheromatous and thrombosed arterial twig in the floor of a recent ulcer.
A System of Practical Medicine By American Authors, Vol. II Various

The patient was an atheromatous subject, with cardiac hypertrophy, bronchitis, and emphysema.
Tics and Their Treatment Henry Meigne

noun (pl) -mas, -mata (-mətə)
(pathol) a fatty deposit on or within the inner lining of an artery, often causing an obstruction to the blood flow

“encysted tumor,” 1706, medical Latin, from Greek atheroma, from athere “groats, porridge” (related to ather “chaff”), in reference to what is inside. For ending, see -oma.

atheroma ath·er·o·ma (āth’ə-rō’mə)
n. pl. ath·er·o·mas or ath·er·o·ma·ta (-mə-tə)
A deposit or degenerative accumulation of lipid-containing plaques on the innermost layer of the wall of an artery.
ath’er·o·ma·to’sis (-tō’sĭs) n.
ath’er·om’a·tous (-rŏm’ə-təs, -rō’mə-) adj.


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