title: Demographic features of idiopathic macular telangiectasia in Korean patients.
abstract: OBJECTIVE
  To investigate the clinical and demographic features of idiopathic macular telangiectasia (MacTel) in Korean patients since the introduction of spectral domain optical coherence tomography (SD-OCT).
  
  
  METHODS
  We reviewed medical records of patients who were diagnosed with MacTel from 2009 to 2013. All patients underwent fluorescein angiography and SD-OCT and were classified as type 1 or type 2 according to the classification system proposed by Yannuzzi.
  
  
  RESULTS
  Over a period of 5 years, 4 (18.2%) patients were diagnosed with type 1 MacTel and 18 (81.8%) patients were diagnosed with type 2 MacTel. All patients with type1 MacTel were male, and their mean age was 51 ± 8.6 years. Among patients with type 2 MacTel, 3 (16.7%) were male, 15 (83.3%) were female, and the mean age was 60 ± 13.6 years. Whereas all type 1 MacTel patients had either metamorphopsia or mild scotoma, of the 18 patients with type 2 MacTel, only 4 (22.2%) had those symptoms, 10 (55.6%) complained of only mild visual impairment, and the other 4 (22.2%) had no symptoms. Intraretinal cystoid spaces were observed in 26 (72.2%) of 36 eyes with type 2 MacTel by SD-OCT. These cystoid spaces had irregular boundaries and did not correspond to angiographic leakages.
  
  
  CONCLUSIONS
  Type 2 MacTel was most common in the present study. The wider availability of SD-OCT may have contributed to the diagnosis of type 2 MacTel. Type 2 MacTel may be more prevalent than type 1 in Koreans, which corresponds to the results of Western countries.
authors.affiliation: Department of Ophthalmology, Dongguk University Ilsan Hospital, Goyang, Korea.
authors.forename: Sung Hyun
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea.
authors.forename: Jaeryung
authors.initials: J
authors.lastname: Oh
authors.affiliation: Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea.
authors.forename: Soh-Eun
authors.initials: SE
authors.lastname: Ahn
authors.affiliation: Department of Ophthalmology, Dongguk University Ilsan Hospital, Goyang, Korea.
authors.forename: Choul Yong
authors.initials: CY
authors.lastname: Park
authors.affiliation: Department of Ophthalmology, Dongguk University Ilsan Hospital, Goyang, Korea.
authors.forename: Jong-Hyun
authors.initials: JH
authors.lastname: Oh
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D056910:Republic of Korea / Q000453:epidemiology; D012160:Retina / Q000473:pathology; D058456:Retinal Telangiectasis / Q000175:diagnosis / Q000453:epidemiology / Q000473:pathology / Q000503:physiopathology; D012189:Retrospective Studies
keywords: Idiopathic juxtafoveal retinal telangiectasia; Macular telangiectasia; Spectral domain optical coherence tomography