To report a patient with orbital pseudotumour that masquerading as orbital cellulitis

A case report

A 42-year-old woman was referred to orbit and oculoplastic clinic with 6 days history of left orbital pain, proptosis, lid edema and fever. Clinical Finding included severe lid edema, chemosis, conjunctival injection and severe restriction in extraocular motility. According to clinical and imaging finding , She was diagnosed as orbital cellulitis and hospitalized for treatment with intravenous antibiotics. Because of no improvement, on the fifth days after admission, systemic corticosteroid, was prescribed. Diagnosis of orbital pseudotumour was made after significant response to systemic corticosteroids. Antibiotics were discontinued and systemic corticosteroid was tapered slowly during the 4 months.

Orbital pseudotumour is an ophthalmologic condition that maybe mimics a variety of pathologic process. Despite complete physical examination and appropriate imaging, sometimes correct diagnosis of the disease would be difficult.