IDIOPATHIC ORBITAL INFLAMMATION (PSEUDOTUMOR)

Idiopathic Orbital Inflammation

Abstract

Orbital pseudotumor is uncommon but not rare. In 1930 Birch-Hirschfeld first used the term pseudotumor to describe orbital inflammation that was associated with proptosis and appeared to be caused by a neoplasm. He described different types of “pseudotumor” [1].Orbital pseudotumor is now considered as a nonspecific, idiopathic, benign inflammatory process consisting of lymphocytes, plasma cells, fibroblasts, macrophages, occasional neutrophils, eosinophils, and epithelial cells; rare granuloma formation and lymphoid follicles; and collagen deposition, localized to the orbit. The clinical course of the disorder may be acute, subacute, or chronic. There is no sex predilection.We are reporting a case to emphasize that it is important in differential diagnosis of proptosis