title: Acquired pseudoduplication of the optic disc in pathologic myopia.
abstract: OBJECTIVE
  To elucidate the mechanism of acquired pseudoduplication of the optic disc and its association with pathologic myopia.
  
  
  METHODS
  The prevalence of pseudoduplication of the optic disc was estimated by reviewing 128 consecutive patients diagnosed as having pathologic myopia between January 2010 and December 2012. The pseudodisc was investigated at the scleral level using enhanced depth imaging spectral-domain optical coherence tomography to elucidate pathologic changes. Fluorescein angiography or indocyanine green angiography was performed to identify the vessel origin.
  
  
  RESULTS
  Among 128 patients with pathologic myopia, 3 patients (2.3%) showed pseudoduplication of the optic disc. Enhanced depth imaging optical coherence tomography showed chorioretinal atrophy and focal scleral excavation in the area showing the pseudodisc. The round scleral excavation gave the underlying visible peribulbar tissue a pinkish appearance, which could be mistaken as the optic disc. Fluorescein angiography or indocyanine green angiography showed that the vessel within the pseudodisc was the short posterior ciliary artery.
  
  
  CONCLUSIONS
  Although not a common presentation, scleral excavation associated with pathologic myopia accompanied by a ciliary artery penetrating the excavation's center could make a lesion mimicking pseudoduplication of the optic disc.
authors.affiliation: *MD †MD, PhD Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea (all authors); and Department of Ophthalmology, Armed Forces Capital Hospital, Seongnam, Korea (SJA).
authors.forename: Seong Joon
authors.initials: SJ
authors.lastname: Ahn
authors.forename: Se Joon
authors.initials: SJ
authors.lastname: Woo
authors.forename: Jeong-Min
authors.initials: JM
authors.lastname: Hwang
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019842:Ciliary Arteries / Q000473:pathology; D004396:Coloring Agents; D003937:Diagnosis, Differential; D005124:Eye Abnormalities / Q000150:complications* / Q000175:diagnosis; D005260:Female; D005451:Fluorescein Angiography; D006801:Humans; D007208:Indocyanine Green; D008297:Male; D008875:Middle Aged; D047728:Myopia, Degenerative / Q000150:complications* / Q000175:diagnosis; D009898:Optic Disk / Q000002:abnormalities*; D012189:Retrospective Studies; D041623:Tomography, Optical Coherence
chemical_list: D004396:Coloring Agents; D007208:Indocyanine Green