. A treatise on the diseases of the eye. , 1876, pp. 258 to 26-3; Trans. Amer. Ophth. Soc, 1879.—B.] (3) Fatty Tumges of the Orbit. [Lipomata.—B.] The fatty tumors are developed in the adipose cellular tissue of the orbit,either in its cavity or between the recti muscles, just beneath the generally occur in early life, and are sometimes perhaps increase slowly in growth, are not accompanied by any symptoms ofpain or inflammation, and vary much in size and consistence. The latterwill depend upon the relative amount of the fatty material, and the firm
. A treatise on the diseases of the eye. , 1876, pp. 258 to 26-3; Trans. Amer. Ophth. Soc, 1879.—B.] (3) Fatty Tumges of the Orbit. [Lipomata.—B.] The fatty tumors are developed in the adipose cellular tissue of the orbit,either in its cavity or between the recti muscles, just beneath the generally occur in early life, and are sometimes perhaps increase slowly in growth, are not accompanied by any symptoms ofpain or inflammation, and vary much in size and consistence. The latterwill depend upon the relative amount of the fatty material, and the firmnessand quantity of the fibro-cellular tissue. They are often very elastic to thetouch, and give rise to a sense of fluctuation, which may deceive us as totheir true nature, and cause them, perhaps, to be mistaken for a cyst. Nodifficulty is generally experienced in their removal, which should, if possible,be done from within the eyelid. [They do not return.—B.] 1 E. L. O. H. Eep., v. 3, 181. 780 DISEASES OF THE ORBIT. [Fig. 247.]. (4) AXD Cartilagixous Tumors. AccordiDg to Mackenzie/ we may distinguish three of exostosis ofthe orbit: 1, the cellular; 2, the craggy, or semi-cartilaginous; 3, the cellular exostosis is characterized by its being composed of an osseouscrust, which .surrounds rather a soft substance, traversed by numerous deli-cate bony partitions. Sometimes, it may contain hydatids. This form of exos-tosis springs from the periosteum, does not generally acquire a considerablesize, and may remain quite stationary. The craggy or semi-cartilaginousexostosis generally consists in the centre of osseous laminte, which aie sur-rounded by cartilage, over which the periosteum may be imperfectly traced, but it has no complete shell. It may growfrom the cancelli or from the ivory exostosis is the form most fre-quently met with in the orbit; it is exces-sively hard, and consists of perfectly de-veloped, dense, and very firm bone
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