carcinoma

(kar-sin-o’mah), pl. carcino’mate (Gr. καρκίνωμα, from καρκῖνος crab, cancer]. A malignant tumor or cancer; a new-growth made up of epithelial cells tending to infiltrate and give rise to metastases. acinous c., carcinoma having an acinous structure, and including encephaloid and scirrhus. acute c., encephaloid, or soft cancer. See cancer. alveolar c., colloid carcinoma. basal celled c., carcinoma developing from the cells of the deepest layer of the superficial epithelium and retaining the character of those cells. chronic Ω., scirrhus or hard cancer. See scirrkus. colloid c., carcinoma in which the cells have undergone colloid degeneration: called also gelatin i form c. cylindric c., carcinoma in which the cells are cylindric or nearly so. encephaloid c., cancer of a soft, brain-like structure, resembling scirrhous carcinoma, but having le connective ti ue, larger alveoli, and more cells. epibulbar c., a carcinoma which starts at the edge of the cornea and spreads over the cornea and conjunctiva. epidermoid 6., carcinoma in which the cells tend to differentiate in the same way that the cells of the epidermis do, that is, they tend to form pickle cells and undergo cornification. epithelial c. See epithlioma. c. epithelia’le adenoi’des, carcinoma forming in epithelial surfaces, but made up of adenoid or gland-like forms. erectile €., an encephaloid containing many blood ve els: called also hemutoid c. gelatin i form c. See colloid c. glandular c., carcinoma in which the cells are of the glandular or secreting type. hematoid c. See erectile c. lenticular c., Resembling or 188 CARD I ANESTHESIA c. lenticula’re, scirrhous carcinoma of the skin with the formation of flattened papules and nodules which run together, forming fungoid ma es. lpomatous c., carcinoma containing much fat. ο. ιπιεὺἰὺοἱ’άοι, a rapidly growing variety. of breast cancer which, by setting up violent. irritation, produces a round-cell infiltration resembling mastitis. Called also mastitis carcinosu. me-~ lanotic c., c. melano’des, encephaloid carcinoma which is blackened with melanin. osteoid c., carcinoma in which there is deposit of bone. per i portal c., cancer of the liver, extending along and around the portal ve els. pultaceous c., encephaloid carcinoma whose alveoli have thick walls and a pulpy juice. seirrhous ¢., carcinoma with a hard structure composed of connective-ti ue alveoli filled with ma es of cells which have no ve els or interstitial substance: called also chronic c. and hard c. solanoid c., one having the consistence of raw potato. squamous c., carcinoma developed from squamous epithelium, and having cuboid cells. tuberous c., c. tubero’sum, scirrhous carcinoma of the skin with the formation of nodular projections.