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The consistence of the tumour depends on the nature and amount of the stroma, and on the presence of degenerative changes. The softer medullary forms are composed almost exclusively of cells; while the harder forms such as the fibro-, chondro-, and osteo-sarcoma are provided with an abundant stroma and are relatively poor in cells.
The osteo-sarcoma is characterised by the formation in the tumour of bone, the medullary spaces being occupied by sarcomatous cells in place of marrow. The osteoid sarcoma is characterised by the formation of a tissue resembling bone but deficient in lime salts, and the petrifying sarcoma by the formation of calcified areas in the stroma.
But this same Christian philosopher Christian? in the twenty-second chapter of his fourth Stroma tells us that for the gnostic that is to say, the intellectual knowledge, gnosis, ought to suffice, and he adds: "I will dare aver that it is not because he wishes to be saved that he, who devotes himself to knowledge for the sake of the divine science itself, chooses knowledge.
Portions of the iris angle may remain open while other parts are closed. Where the iris tissue lies in contact with the cornea, the stroma of the iris almost totally disappears. In some cases the iris becomes totally adherent to the cornea. Ciliary Body and Chorioid.
The haziness of the cornea and slight turbidity of the aqueous contribute greatly to the apparent change in the color of the iris. In cases of simple chronic glaucoma there is but little evidence of edema of the iris. As the disease progresses, the stroma of the iris atrophies and contracts. There is very little evidence of small-cell infiltration or the formation of cicatrical tissue.
The liquid portion of the blood is called the plasma; the small bodies are known as corpuscles. Other round particles, smaller than the corpuscles, may also be seen under favorable conditions. These latter are known as blood platelets. Each one consists of a little mass of protoplasm, called the stroma, which contains a substance having a red color, known as hemoglobin.
If the alveoli are small and the intervening stroma is abundant and composed of dense fibrous tissue, the tumour is hard, and is known as a scirrhous cancer a form which is most frequently met with in the breast.
The stroma, which forms only about one tenth of the solid matter of the corpuscles, serves as a contrivance for holding the hemoglobin. *Disappearance and Origin of Red Corpuscles.*—The red corpuscles, being cells without nuclei, are necessarily short-lived.
The term sarcoma is applied to any connective-tissue tumour which exhibits malignant characters. The essential structural feature is the predominance of the cellular elements over the intercellular substance or stroma, in which respect a sarcoma resembles the connective tissue of the embryo. The typical sarcoma consists chiefly of immature or embryonic connective tissue.
Melanin pigment is formed in relation to the cells and stroma of certain epithelial tumours, giving rise to melanotic cancer, one of the most malignant of all new growths. Cyst-like spaces may form in the tumour by the accumulation of the secretion of the epithelial cells, or as a result of their degeneration cystic carcinoma.
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