The pathology and surgical treatment of tumors . y, either along the optic nerve or through the orbital fissure. Asa heterotopic tumor glioma has been found in exceptional cases in thekidney, the ovary, and the testicle. Knapp reported the first case inwhich the tumor gave rise to metastasis. Similar cases have since beenreported by Schiess-Gemuseus, Hofmann, Rusconi, Bizzozero, Dresch-feld, Nellessen, and Heymann and Fiedler. Helfreich reported a case of congenital glioma of both retinae,Eisenlohr believes that glioma of the retina develops from nests ofmesoblastic cells from the vitreous bod
The pathology and surgical treatment of tumors . y, either along the optic nerve or through the orbital fissure. Asa heterotopic tumor glioma has been found in exceptional cases in thekidney, the ovary, and the testicle. Knapp reported the first case inwhich the tumor gave rise to metastasis. Similar cases have since beenreported by Schiess-Gemuseus, Hofmann, Rusconi, Bizzozero, Dresch-feld, Nellessen, and Heymann and Fiedler. Helfreich reported a case of congenital glioma of both retinae,Eisenlohr believes that glioma of the retina develops from nests ofmesoblastic cells from the vitreous body that fail to undergo completedevelopment, and from which the tumor subsequently takes its origin. Psammoina.—Psammoma is an endothelial growth of the envelopesof the brain that was first described by Virchow as a separate this tumor lacks the clinical features of sarcoma, Virchowincluded it with the sarcomata. Sutton refers it to an epithelial matrixin the villous processes of the choroid plexus ; but as it is found more fre-. -Microscopical appearance of a typical psammoma. quently in localities where there are normally no epithelial cells, it isadvisable to include it among the connective-tissue type of tumor is composed of onion-like cell-masses separated by a stromaof connective tissue. These concentric bodies consist of endothelium-like cell-nests arranged around blood-vessels, which in the course of 550 PATHOLOGY AND TREATMENT OF TUMORS. time become infiltrated with calcareous salts. The relation of thetumor-tissue to blood-vessels is well shown in Figure 397.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectneoplas, bookyear1895
