title: [Branch retinal vein occlusion in a 20-year-old patient].
abstract: METHODS
  A 20-year-old patient from India was referred because visual acuity of the left eye had deteriorated four weeks ago. A left branch retinal vein occlusion (BRVO) had been diagnosed in an external eye clinic.
  
  
  METHODS
  His best corrected visual acuity was 1,0 in the right eye but only 0.3 in the left. Intraocular pressure was normal. Fundoscopy of the left eye confirmed the finding of a left BRVO. Fluorescein angiography showed evidence of a retinal vasculitis resulting in an ischemic BRVO. Full blood count showed leucocytosis. Chest X-ray, thoracic CT and an Interferon-Gamma Release Assay (IGRA) were suggestive of systemic tuberculosis (TB).
  
  
  METHODS
  Antituberculosis treatment with ethambutol, isoniazid, rifampicin and pyrazinamide was administered for 4 months followed by maintenace therapy of isoniazid and ethambutol for 6 months. 6 months after treatment visual acuity of the left eye had improved; the findings of lung TB had regressed.
  
  
  CONCLUSIONS
  BRVO associated with ocular TB is a rare presentation of retinal vasculitis. This rare manifestation of a BRVO emphasizes the need of thorough systemic evaluation in young patients with BRVO.
authors.affiliation: Moorfields Eye Hospital, London, UK. Nick.Kopsachilis@moorfields.nhs.uk
authors.forename: N
authors.initials: N
authors.lastname: Kopsachilis
authors.forename: T
authors.initials: T
authors.lastname: Tourtas
authors.forename: A I C
authors.initials: AI
authors.lastname: Marinescu
mesh_terms: D003937:Diagnosis, Differential; D054242:Emigrants and Immigrants; D005451:Fluorescein Angiography; D005858:Germany; D006801:Humans; D007194:India / Q000208:ethnology; D008297:Male; D019721:Ophthalmoscopes; D031300:Retinal Vasculitis / Q000175:diagnosis*; D012170:Retinal Vein Occlusion / Q000175:diagnosis* / Q000209:etiology*; D014057:Tomography, X-Ray Computed; D014376:Tuberculosis / Q000175:diagnosis*; D055815:Young Adult