A Clinical Analysis of Idiopathic Orbital Inflammatory Pseudotumor

Purpose: To observe the clinical findings and response to treatment in patients with a diagnosis of idiopathic orbital inflammatory pseudotumor.Methods: 209 idiopathic orbital inflammatory pseudotumor cases seen between Jan 1, 1978 and Dec 31, 1999 in our hospital were evaluated retrospectively. Results: Of the 209 cases, 118 were male and 91 were female; there were 90 in the right eye, 81 left eye and 38 both eyes. Patients age ranged from 4 to 80 years (mean 44.4). Proptosis (66%), palpable mass (65%), swollen eyelid (55%), increased orbital pressure (55%) and motility restriction (48%) were the five most common presenting signs. According to radiologic and surgical findings, focal mass within orbit was the most frequent subtype (43% ), followed by lacrimal inflammatory pseudotumor (32%), diffuse orbital inflammation (10%), myositis (8%) . Perineuritis (2%), periscleritis(2%), acute inflammation (2%) and eyelid pseudotumor (1%) were rare clinical findings. The response to treatment (with a mean follow