epithelioma (ep"e-the-le-o'mah)

Syn.: carcinoma epithelioides. A carcinoma of the skin or the mucous membrane, consisting of squamous epithelial cells. basal-celled e. An e. consisting of the lowest or malpighian layer of cells in the epidermis. calcific e., calcified e. An epithelioma that has undergone calcareous degeneration, chorio-e. See syncytioma. corneous e. An e. the layers of which resemble the outer layer of epidermal cells, cylindrical e. A variety of e. in which the epithelial cells resemble ordinary columnar epithelia and the structure itself is quite like ordinary mucous membrane, diffuse e. A form of epithelioma characterized by a rapid infiltration of the surrounding connective ti ue with epithelial cells, especially between the' muscles and along the ve els and nerves, e. contagiosum, e. molluscum. See molluscum contagiosum. e. myxoma to des psammosum. A peculiar form of tumor found in the third ventricle of the brain, resembling a very soft myxoma; characterized by milk white granular contents, flat celled e. See squamous e. pavement celled e. A form of e. in which the cells resemble those of pavement epithelium. squamous celled e., squamous e. A variety of e. in which the cells resemble those of squamous epithelium and form ma es which are very like the follicles of cutaneous glands, villous e. An e. on the inner surface of the bladder, which grows in the shape of branched villi. [Gr., epi, upon, + thele, nipple, -f oma, tumor.]