title: Massive orbital cyst of the lateral rectus muscle after retinal detachment surgery.
abstract: A 73-year-old white man presented with painless proptosis of the right eye 18 years after retinal detachment surgery on the same eye. Computed tomography (CT) showed a mass in the area of the lateral rectus muscle and magnetic resonance imaging (MRI) defined the multiloculated cystic mass to be located within the lateral rectus muscle. At the time of surgery, a large, thin-walled cystic lesion was found within the lateral rectus muscle. Histopathologically, the cystic mass was of nonkeratinizing stratified squamous conjunctival epithelium. Massive orbital cysts after retinal detachment surgery are rare. The authors review the literature and comment on the differential diagnosis and presumed pathogenesis of this lesion.
authors.affiliation: Oncology Service, Wills Eye Hospital, Jefferson Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania 19107.
authors.forename: P
authors.initials: P
authors.lastname: De Potter
authors.forename: A W
authors.initials: AW
authors.lastname: Kunin
authors.forename: C L
authors.initials: CL
authors.lastname: Shields
authors.forename: J A
authors.initials: JA
authors.lastname: Shields
authors.forename: P K
authors.initials: PK
authors.lastname: Nase
mesh_terms: D000368:Aged; D003229:Conjunctival Diseases / Q000175:diagnosis; D003287:Contrast Media; D003560:Cysts / Q000175:diagnosis / Q000209:etiology*; D003937:Diagnosis, Differential; D005094:Exophthalmos / Q000209:etiology; D005682:Gadolinium; D019786:Gadolinium DTPA; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009135:Muscular Diseases / Q000175:diagnosis / Q000209:etiology*; D009801:Oculomotor Muscles; D009916:Orbital Diseases / Q000175:diagnosis / Q000209:etiology*; D009942:Organometallic Compounds; D004369:Pentetic Acid / Q000031:analogs & derivatives; D011183:Postoperative Complications; D012163:Retinal Detachment / Q000601:surgery*; D014057:Tomography, X-Ray Computed
chemical_list: D003287:Contrast Media; D009942:Organometallic Compounds; D004369:Pentetic Acid; D005682:Gadolinium; D019786:Gadolinium DTPA