The pathology and surgical treatment of tumors . HOLOGY AND TREATMENT OF TUMORS. The operative treatment of aural myxomata should be consigned toskilled aural surgeons, as the reckless use of instruments and of causticsin the middle ear is calculated not only to destroy hearing, but mayeven be followed by fatal cerebral complications. Nerve-sheaths.—Myxomatous tumors are not infrequently foundin the central nervous system, the brain and the spinal cord. Myxomaof the sheaths of peripheral nerves is called neuromaniyxomatosuni. The tumors often occur multiple, andthey have been found in connecti
The pathology and surgical treatment of tumors . HOLOGY AND TREATMENT OF TUMORS. The operative treatment of aural myxomata should be consigned toskilled aural surgeons, as the reckless use of instruments and of causticsin the middle ear is calculated not only to destroy hearing, but mayeven be followed by fatal cerebral complications. Nerve-sheaths.—Myxomatous tumors are not infrequently foundin the central nervous system, the brain and the spinal cord. Myxomaof the sheaths of peripheral nerves is called neuromaniyxomatosuni. The tumors often occur multiple, andthey have been found in connection with diffusednerves (Fig. 290). They often produce serious func-tional disturbances in the form of neuralgia or paraly-sis. The most frequent seat of myxomatous tumorsof the nerve-sheaths is the optic nerve. Glands.—In the mammary and salivary glands,the ovary, and the testicle myxomatous tumors occurfrequently, but usually in combination with otherbenign tumors or as the result of regressive meta-morphosis of benign or malignant Fig. 290.—Myxof sheath of the ulnarnerve (after Hiiter). XX. CHONDROMA. Chondroma is a tumor which, according to its structure, is a closeimitation of hyahne, reticulated, or fibrous cartilage. It occurs in partsof the body in which cartilage exists in the fetus, as in the epiphysealextremities of the long bones, or it springs from an island of displacedcartilage-cells, as in the connective tissue, the parotid gland, the testicle,and the ovary. Definition.—A chondroma is a tumor composed of cartilage wliicli isthe product of tissue-proliferation from a matrix of chondroblasts. Thisdefinition refers all cartilaginous tumors to a matrix composed ofembryonal cartilage-cells. Origin.—It has been customary to attribute to the connective tissueunder certain conditions a chondrogenetic function. It is not morelikely that connective tissue can produce cartilage than that it can pro-duce epithelial cells. In the study of the origin of tumo
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectneoplas, bookyear1895
