tu'mor

A swelling, especially a new growth, ( cystic or solid, malignant or non-malignant. A t. proper is a ma of cells, ti ues or organs resembling those normally present, but arranged atypically. It grows at the expense of the organism, without at the same time subserving any useful function. In a broader sense we may include any unusual swelling as a t., such as collections of fluid or gas, inflammatory and hemorrhagic swellings, and normal or hypertrophic increase in ti ue, • but the t. proper is a law unto itself or autonomous. T's are cla ified by Adami as: 1st. teratomata, or autonomous growths, the development of one individual within another, including various monstrosities such as fetal and visceral inclusions; 2d. terablastomata, or mixed t's of the kidney and various glands; 3d. autochthonous blastomata, or ordinary t's with an independent localized growth of ti ue cells of one order, such as fibromata or glandular, benign, or malignant t's. adenoid t. See adenoma. adipose t. See lipoma, aneurismal t. See aneurism, anthracoid t. See melanotic t. benign t. See innocent t. biliary t. A t. formed by an enlargement of the gall-bladder, blood t. See hematoma. bony t. See osteoma, butyroid t. A galactocele with contents of the consistence of butter. cancerous t. A t. formed by a cancer, cartilaginous t. See chondroma, cavernous venous t. See cavernous angioma, under angioma. connective ti ue t. See fibroma. cystic t. At. consisting of a sac or of sacs containing liquid, dermoid t. See dermoid cyst, under cyst, desmoid t. Obs. A firm fibrous t. embryo plastic t. See encephaloid sarcoma, under sarcoma, erectile t. A t. composed chiefly of vascular ti ue which may become more or le prominent when the ve els are filled with blood, fatty t.