title: Idiopathic orbital pseudotumour.
abstract: Idiopathic orbital pseudotumour (IOP) is a benign inflammatory condition usually confined to the orbit. This may involve single or multiple intraorbital structures. Extraorbital extension can also occur. The imaging appearances often mimic other orbital diseases. Both computed tomography (CT) and magnetic resonance imaging (MRI) are frequently used to investigate orbital diseases, and it is important for radiologists to be aware of the variety of imaging appearances that occur in IOP. We present the imaging appearances in histopathologically confirmed cases of IOP and discuss the clinical features, natural history, and differential diagnosis of this condition.
authors.affiliation: Department of Radiology, Zhejiang Provincial People's Hospital, Hangzhou, China. hangzhoudzx73@126.com
authors.forename: Z X
authors.initials: ZX
authors.lastname: Ding
authors.forename: G
authors.initials: G
authors.lastname: Lip
authors.forename: V
authors.initials: V
authors.lastname: Chong
mesh_terms: D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D019574:Optic Nerve Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D009915:Orbit / Q000000981:diagnostic imaging / Q000473:pathology*; D016727:Orbital Pseudotumor / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D015422:Scleral Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D014057:Tomography, X-Ray Computed