planar xanthoma /plā′nər/ [L, planum, level; Gk, xanthos, yellow, oma, tumor] , a yellow or orange flat macule or slightly raised papule containing foam cells and occurring in clusters in localized areas, such as the eyelids. These lesions may be widely distributed over the body. Also called plane xanthoma, xanthoma planum. See also xanthelasmatosis.
