Carcinoma

(kar - sin - ofmah) [napnivo/ua; Kapicivog, a crab; 6/j.a, tumor]. A malignant epithelial tumor composed of a connective ti ue stroma, surrounding groups or nests of epithelial cells. Three varieties are generally described — the squamous, the cylindric, and the glandular. C, Colloid, affects chiefly the alimentary canal, uterus, etc.; the delicate connective-ti ue stroma is filled with colloid matter, the result of a colloid degeneration of the epithelial cells. In some cases the degeneration is mucoid, instead of colloid. C, Cylindric, one in which the cells tend to a ume a cylindric or columnar shape. This shape is best seen in the cells nearest the periphery of the nests. C, Encephaloid, is of rapid growth, with a small amount of stroma, large alveoli, and greater amount of cells and blood-ve els. C, Glandular, a carcinoma in which the cells are of the glandular or secreting type. C, Squamous, one derived from squamous epithelium; the cells are cuboidal in shape. 174