Diseases of the eye : a hand-book of ophthalmic practice, for students and practitioners / by G.E. De Schweinitz.

  • De Schweinitz, G. E. (George Edmund), 1858-1938.
Date:
1893
Catalogue details

Licence: Public Domain Mark

Credit: Diseases of the eye : a hand-book of ophthalmic practice, for students and practitioners / by G.E. De Schweinitz. Source: Wellcome Collection.

Provider: This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.

    575/680 (page 565)
    1. Twmors which Originate in the Tissues of the Orbit.—These include cysts (sebaceous and dermoid cysts, echinococci and cysticerci), cavernous and simple angiomas, lipomas, enchon- dromas, lymphomas, and various types of sarcoma. Carcinoma, except in connection with the lachrymal gland, does not occur here as a primary tumor. Sarcomas of the orbit should not be confounded with those which arise within the eyeball and have burst their boundaries (page 358). Occasionally a simple incision suffices to cure a cyst if the cavity is afterwards frequently syringed with an astringent or antiseptic lotion, li' semi-solid or solid contents arc present, entire removal is necessary. Care must be taken not to con- found an encephalocele with an orbital cyst. 2. Tumors which Arise from lh<- I'eriosteum or Boij/ Walls of f/i< Orbit.—These include :— (a) Sarcomas, which arise from the periosteum. (b) Thickening of the Periosteum, which may simulate a true tumor, especially if the underlying bone is hypertrophied (hy- perostoses : these may be multiple or diffuse), and— (c) Exostoses.—The latter are very hard tumors having an ivory-like shell and a nucleus of spongy bone, their anatomical structure in general being like those of the osteomas proceeding from adjacent cavities.1 All orbital osteomas grow slowly—the external exostoses more slowly than the bony tumors which originate from the frontal and ethmoidal sinuses. They spring from the periosteum, and are generally found at the upper border of the orbit, although they may occur at any portion of the orbital border, and are recognized by their dense hardness, and evident connection with the bone. They may arise from injury ; sometimes they are congenital, and often their origin is obscure. The operation for the removal of an exostosis consists in drilling it away at the base and completing the separation by means of a hammer and chisel. The operation is attended with ennsiderable risk. 1 For a valuable paper by J. A. Andrews, on Osteomas of Orbit, see Medical Record, September 3, 1887.