A review
نویسنده
چکیده
The term pseudotumour of the orbit is unfortunate, since it merely purports to describe a negative quality of a considerable number of diverse pathological conditions. Among ophthalmologists it is common practice to limit the term to those lesions which are of an idiopathic inflammatory nature (Blodi and Gass, 1967), whereas Birch-Hirschfeld, who introduced the term, included all non-neoplastic disorders (Birch-Hirschfeld, 1905). Not only is the term open to arbitrary definition of this kind but it confers the dubious status of a diagnostic label on a group of conditions whose nature is often almost entirely shrouded in mystery. Easton and Smith (1961) proposed the alternative term non-specific granuloma of the orbit but this describes only a minority of intraorbital inflammatory lesions and consequently is of limited application. Most non-neoplastic orbital swellings are reactive and as such can be due to infection, parasitic infestation, foreign-body reaction, and a variety of allergic disorders. Moreover, while many are purely orbital lesions, others appear as part of a more widespread disorder. Only in a minority of cases, however, can a specific cause be implicated, the rest posing one of the major unsolved problems of ocular pathology.
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