Plastic dermoid cyst.
نویسندگان
چکیده
DERMOID cysts are most commonly found at the upper and outer angle of the orbit (Wolff, 1951). They are smooth, round or hour-glass shaped, and vary in size from a pea to a large orange. They may be differentiated from a cephalocele by their tenseness and incompressibility and the absence of cerebral symptoms (Duke-Elder, 1964). They contain secretions of the sweat and sebaceous glands and cast-off hairs and corneal epithelium. The latter usually predominate and the cyst becomes atheromatous, but when the sebaceous constituent predominates an oily cyst results (Chavasse, 1901). Various secondary changes have been described. Sebaceous material escaping into the cyst wall may give rise to foreign body reaction (Friedenwald, Wilder, Maumenee, Sanders, Keyes, Hogan, Owens, and Owens, 1952). The epithelial lining may be partly converted into granulation tissue and subepithelial cells may undergo fatty degeneration (Wolff, 1951). Inflammatory and ulcerative changes in the wall of an old orbital dermoid cyst may lead to the formation of granulation tissue and fibrous cicatrix (Parsons, 1904). Pressure on the wall may lead to atrophy and thinning. The ulcerative process may destroy the whole epithelium and the cyst may become disorganized into a soft pulpy mass (Duke-Elder, 1964). The present case is reported because of its extreme plasticity.
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عنوان ژورنال:
- The British journal of ophthalmology
دوره 51 12 شماره
صفحات -
تاریخ انتشار 1967