Carcinoma

(kar-sin-o/-mah). A malignant tumor, characterized by a network of connective ti ue whose areolae are filled with cell ma es resembling epithelial cells. See Tumors, Table of. C, Chimney-Sweepers'. See Epithelioma. C, colloid (Alveolar), affects chiefly the alimentary canal, uterus, peritoneum, etc.; the delicate connective ti ue stroma is filled with colloid matter in alveoli, or C. cutis, cancer of the skin. See Epithelioma. C, desmoid. See Hodgkin's Disease . C, encephaloid, is of rapid growth, with a small amount of stroma, large alveoli, and greater amount of cells and blood-ve els. Hematoid (bloody), Osteoid (in bones), Villous (papillary), etc., are other varieties, encephaloid in character. C, epitheliomatous, or squamous-celled, the cells resemble squamous epithelium, and they invade the adjacent ti ue in a columnar manner. C. lenticulare, the most common form of cutaneous scirrhus. It begins as small, shot-sized, flattish, red papules, that enlarge to the size of a pea, bean, or filbert, most of them projecting above the surface, while others are subcutaneous. They are generally seated on a red or violaceous surface, and these coalesce into large irregular ma es that sooner or later break down, ulcerate, and fungate, sometimes bleeding profusely. The patient soon dies of exhaustion. C, lipomatous, contains cells infiltrated with fat. C, medullary. Same as C, Encephaloid. C. melano des, similar to C. Lenticulare, but marked by dark-blue, brown or black papules, that break into fungous growths. C, melanotic, has cells filled with dark pigment. C, scirrhous, or Hard, most commonly in the breast; it has a stout fibrillated stroma, closely packed with large nucleated cells. C. tuberosum, a rarer form of cutaneous scirrhus in which the nodules are of a larger size, even up to that of a hen's egg. The patient speedily dies of exhaustion consequent upon ulceration of the tubercles. C, Stiles's Test for; the excised part is washed in a five per cent, solution of nitric acid for ten minutes, washing it then in cold water for five minutes. The carcinomatous ti ue appears a dull white, the normal ti ue translucent.