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Arch Ophthalmol. 1999;117:801.

	Since this article does not have an abstract, we have provided the first 134 words of the full text and any section headings.

Echinococcus Cysts.

Up to the present time thirty-eight cases of echinococcus cysts in the orbit are known. Weeks collected thirty-three and to this number Rabinovitch has added five more. They are observed either as simple cysts up to the size of a pigeon's egg, or there may be from three to ten vesicles from the size of a lentil to that of a nut. As a rule the parasites are enclosed in a connective-tissue capsule. . . . As previously mentioned, echinococcus cysts contain a clear fluid of neutral or alkaline reaction and a specific gravity of 1008 to 1013. Scolices, hooklets, or portions of the characteristic membrane may be demonstrated microscopically. Treatment consists either in puncture with drainage or in radical operation.

Reference: Klingelhoffer W. Extirpation of an orbital cyst. Arch Ophthalmol. 1897;27:35.