xanthoma

noun
xan·tho·ma | \zan-ˈthō-mə \
plural xanthomas also xanthomata\-mət-ə \

Medical Definition of xanthoma 

: a fatty irregular yellow patch or nodule containing lipid-filled foam cells that occurs on the skin (as of the eyelids, neck, or back) or in internal tissue and is associated especially with disturbances of lipid metabolism

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